Этот вопрос возникает,когда мы встречаемся с незнакомым расширением файла.
Давайте разберемся какой программой их открыть, а также что они из себя представляют.
Если вы не знаете какое расширение у вашего файла, вам нужное сделать следующее:
Зайдите в Панель Управления и найдите пункт Параметры папок. В нем переходим во вкладку Вид и находим пункт Скрывать расширения для зарегистрированных файлов. Снимаем галочку с этого пункта и теперь в конце каждого файла будет указан формат файла. Он обозначается после точки. Пример: файл.txt. Здесь формат -txt.

Для Вас возможно будет интересно узнать,какие программы находятся в папке

-arj: ARJ или ARJ32 (ARJ Software), Zipeg

-arm: Windows AMR Tool, Mobile AMR Converter,

RealNetworks RealPlayer, Apple QuickTime Player

-arw: Adobe Photoshop CS4, Adobe Photoshop

Elements 8, ImageMagick Studio ImageMagick, Sony

RAW Driver, Sony Image Data Converter SR

-asd: Microsoft Office

-asec: Google Android SDK

-asf: Media Player Classic, Zoom Player, VLC Media

Player , Windows Media Player, Light Alloy

-ashx: Microsoft Visual Web Developer, блокнот

-aspx: Microsoft Visual Studio, в любом браузере

-ast: Adobe Photoshop, Illustrator, Acrobat или Apple

ClarisWorks

-att: Weaver Software PostData Spider, Блокнот

Windows, другой текстовый редактор

-avc: Kaspersky Anti-Virus, Kaspersky Internet

Security

-avchd: K-Lite

-avi: Media Player Classic, Windows Media Player,

Zoom Player,MPlayer,VLC Media Player

-awb: Kodak Imaging for Windows,Smart

FaxSee,FaxSee Pro,Polybytes PolyView

-bak: Autodesk AutoCAD

-bat: Исполняемый файл, запускается

операционной системой

-bdmv: VLC Media Player ,CyberLink PowerDVD,Roxio

Creator,Corel WinDVD

-bdrip: VLC media playe

-big: FinalBig,AssetCache Builder

-bik: Windows Media Player с Windows 7 Codec Pack

-bin: UltraISO , Nero , MagicISO

-bkf: Windows Backup and Restore,Microsoft

Windows NT Backup - Restore,SysTools BKF Repair

blu ray: Cyberlink PowerDVD 10

-bmp: Paint.NET,CorelDRAW Graphics Suite,Adobe

Acrobat,Adobe InDesign,Nuance OmniPage

-bsa: BSA Commander,BSA Unpaker,FOMM (FallOut

Mod Manager),FO3 Archive,Quick Morrowind BSA

-bup: Nero,CyberLink PowerDVD,Corel WinDVD

-bwg: BrainWave Generator

-bz2: Windows, WinRAR

-cab: BobCAD-CAM,PRO

Landscape,AutoSketch,ExtraCAD,LogiKal

-cbr: STDU Viewer,Calibre,WinRAR,StuffIt Deluxe

-cbz: Windows Comical, CDisplay

-ccd: MagicISO,Smart Projects IsoBuster,SlySoft

CloneCD,H+H Software Virtual CD,Lightning UK!

ImgBur

-cda: Windows Media Player,Apple iTunes, Nullsoft

Winamp, RealNetworks RealPlayer, VLC Media Player

-cdi: IsoBuster,UltraISO,PowerISO,MagicISO

-cdp: N3V Games Trainz Driver, N3V Games Trainz

Railway, Trainz CDP Batcher, Trainz Pro Routes CDP

Browser

-cdw: КОМПАС,КОМПАС-3D Viewer

-cfg: Bred 3, Notepad++,PSPad editor,Блокнот

-cfp: Cfont Pro

-chm: FBReader,Calibre, Microsoft HTML Help

Executable, xCHM

-class: Eclipse IDE for Java Developers с плагином JD-

Eclipse, Oracle Java Runtime Environment, dirtyJOE,

-JD-GUI

-cpi: Adobe Premiere, Roxio Creator, Adobe Premiere

Elements, CyberLink PowerDirector, Pinnacle Studio

-cpt: IrfanView, XnView, Corel Photo-Paint

-cr2: Adobe Photoshop,ACDSee,XnView

-crd: Блокнот, Bred 3, PSPad editor, Notepad++ и

любым другим текстовым редактором

-crdownload: Google Chrome

-crw: Программное обеспечение, поставляемое с

камерой Canon, Adobe Photoshop CS, Adobe

Photoshop Elements, ACDSee Photo Manager, ACD

Systems Canvas

-crx: Google Chrome

-csd: Manga Studio

-cso: PSP ISO Compressor, CiSO Converter, Windows

UMDGen

-ctg: Не могут быть открыты вручную

-cue: Alcohol 120%, Nero, IsoBuster, UltraISO,

MagicISO

-cvs: Canvas X

-cxarchive: майнкрафт

-daa: PowerISO, UltraISO, WinArchiver,DAA2ISO

-dat: Bred 3,Notepad++,PSPad editor,Блокнот

-data: блокнот

-dav: KMPlayer,DVR365 Player,DAV Player

-db: Блокнот, PSPad editor, Notepad++

-dbf: dBASE, Visual FoxPro, Microsoft Access,

Microsoft Excel, DBFShow

-dbk: WinZip, WinRAR,ALZip

-dbx: Microsoft Outlook Express, MailNavigator, Почта

Windows Live, OE-Mail Recovery, Remo Recover

Outlook Express

-dc1: Stata Labs Bloomba

-dcm: Adobe Photoshop, ACD Systems Canvas,

-IrfanView, XnView,DicomWorks

-dctmp: DC++

-dds: Adobe Photoshop, IrfanView, Microsoft DirectX

Texture Editor, Nvidia DDS Utilities, Otaku DeskSpace

-deb: 7-Zip (для lunix Alien)

-dtu: deltup (Linux)

-dem: Half-Life: Counter Strike, Hexen 2, VirtualDub

-dff: DFF Viewer, RW Analyze, GTA Tools, SA Tools,

Zanoza Modeler

-dfx: Autodesk AutoCAD, Autodesk Maya, Logipole

Konvertor, eDrawings, Softdesk Drafix

-dgdat: вручную не открывается

-dgn: Autodesk AutoCAD, Corel PaintShop, IMSI

TurboCAD, Rhinoceros (Rhino), AutoDWG DGN to

DWG Converter

-divx: Media Player Classic, Zoom Player, CyberLink

PowerDVD, Light Alloy, BSplayer

-diz: Bred 3, Блокнот, PSPad editor, Notepad++

-djproject: After Effects

-djvu: DjVu Reader , STDU Viewer, Calibre

-dll: Windows Resource Hacker

-dmf: DeliPlayer, StormSky RainbowPlayer, MODPlug

Tracker или Player, Xtracker32, FMJ-Software Awave

Studio

-dmg: UltraISO, MagicISO, Acute Systems TransMac

-dmp: Microsoft Visual Studio, Windows Debug Tools,

Windows Kernel Debug, Microsoft Dumpflop utilit

-doc: word, OpenOffice.org

-docm: word, OpenOffice.org

-docx: word, OpenOffice.org

-dotx: word, OpenOffice.org

-dsnv: OrCAD PCB Designer

-dt:перекодировать в 1с

-dts: Apple iTunes, CyberLink PowerDVD, VLC Media

Player, Media Player Classic, Corel WinDVD

-dtshd: DTS-HD Master Audio Suite, DTS Surround

Audio Suite

-dv4: Bosch Security Systems Archive Player,

Windows Media Player с кодеком Xvid, Media Player

Classic с кодеком Xvid

-dvd: k-lite, KMP и другие программы,

воспроизводящие видео

-dvdrip: Windows Media player 11

-dvr: Windows Media Playe, Media Player Classic,

Microsoft Windows Media Center, WinDVD Creator

-dwf: Autodesk AutoCAD, Autodesk Inventor, IMSI

TurboCAD

-dwg: Autodesk AutoCAD, Autodesk Inventor, IMSI

TurboCAD

-dxf: Autodesk AutoCAD, Autodesk Inventor, IMSI

TurboCAD

-ecw: Erdas Imagine, ACD Systems Canvas,

IrfanView, ArcGIS, TatukGIS Viewer

-eml: Mozilla Thunderbird, Microsoft Outlook,

Microsoft Outlook Express, Windows Mail, а так же

любым браузером

-emz: Microsoft Office, Microsoft Visio, XnView, Corel

PaintShop, Logipole Konvertor

-epf: 1С: Предприятие, 1С:Бухгалтерия

-eps: Adobe Illustrator, Adobe Photoshop, CorelDRAW

Graphics Suite, Inkscape, ACDSee

-epub: Adobe Digital Editions

-ert: 1С:Бухгалтерии

-esp: Fallout 3, Fallout: New Vegas, Bethesda

Softworks G.E.C.K.

-ex4: MetaQuotes MetaTrader, ex4_to_mq4,

-ex4_to_mq4 decompiler

-exe: Двойным кликом мыши, Resource Tuner,

Resource Hacker, eXeScope

-f4v: Adobe Flash Player, Adobe Flash, Adobe

InDesign, VLC Media Player, Adobe Creative Suite

-fb2: FBReader, STDU Viewer, CoolReader, Calibre,

TequilaCat Book Reader для телефонов с Java

-fbd: FBDMaker, MyHomeLib, Fb2Librarian

-fdb: Extensis Portfolio

-fla: Adobe Flash

-flac: Nullsoft Winamp с подключаемым модулем

FLAC, VLC Media Player , Roxio Creator, Adobe

Audition, VUPlayer, Windows Media Player с плагином

CoreFLAC

-flv: Adobe Flash Player, Media Player Classic, Adobe

Flash, Adobe InDesign, FLV Player

-fp3: FastReport Viewer

-frd: MS LiveMeeting 2007

-frf: Font Monger, FreeReport

-frp: Best Zvit

-frw: КОМПАС, КОМПАС-3D Viewer (бесплатна)

-fsb: Firelight Technologies FMOD Designer, Firelight

Technologies FMOD Sandbox

-gadget: WinZip, Microsoft Windows Vista, Microsoft

Windows 7, Microsoft Windows 8

-gcf: Valve Steam, GCFScape

-gdb: Embarcadero InterBase, Recoveronix

InterbaseRecovery, IBExpert

-gen: ESRI ArcView

-gho: Symantec Norton Ghost Explorer, Symantec

Norton Ghost

-gif: ACDSee, ACD Systems Canvas, Paint.NET,

XnView, Adobe Photoshop

-gp4: Guitar Pro, TuxGuitar, DGuitar

-gp5: Guitar Pro, TuxGuitar, DGuitar

-gpx: Google Earth, Merkaartor, TopoGrafix EasyGPS,

Microsoft Streets & Trips, Garmin MapSource

-grp: Windows Program Manager Group Converter

(файл grpconv.exe), SmarterTools SmarterMail

-gsf: Steam

-gsm: Awave Studio, NCH Switch, SoX

-gz: WinRAR, WinZip, 7-Zip, ALZip, StuffIt Deluxe

-h264: Media Player Classic, Windows Media Player,

VLC Media Player , BSplayer, Apple QuickTime Player

-hlp: Adobe RoboHelp, Help Explorer Viewer, Microsoft

Help Workshop, YpgSoft Windows HLP To RTF

-htm: любой веб-браузер, а так же любой

текстовый редактор

-html:веб-браузер, блокнот

-ibk: ICE Book Reader Professional Russian Version

-ico: IcoFX, Axialis IconWorkshop, ActivIcons

-idx: CyberLink PowerDVD, VLC Media Player,

URUWorks Subtitle Workshop, DVDSubEdit

-ifo: VLC Media Player , Windows Media Player, Roxio

Creator, CyberLink PowerDVD, Nero

-igs: IMSI TurboCAD, Autodesk AutoCADс плагином

IGES Import, Autodesk Inventor, Autodesk 3ds Max,

ACD Systems Canvas

-ima: UltraISO, Nero, MagicISO, WinImage

-img: UltraISO, Nero, MagicISO, WinImage

img: UltraISO, Nero, MagicISO, WinImage

-indd: Adobe Acrobat, Adobe InDesign, Adobe InCopy,

QuarkXPress с плагином ID2Q XTension

-ini: Блокнот, Microsoft Office Word, Notepad++,

Bred 3, PSPad editor

-ipa: установить на iPhone, iPod Touch или iPad

-iso: PowerISO, Alcohol 120%, DAEMON Tools,

UltraISO, WinRAR

-isz: UltraISO, Alcohol 120%, DAEMON Tools,

WinMount

-ithmb: iThmb converter

-iwd: Activision Call of Duty 2, Activision Call of Duty

4, рапаковка с помощью WinZip 12 Pro - Free Trial

-jad: MidpX, LogoManager Mobile Media Browser,

JADMaker, а так же любым текстовым редактором

-jar: Java Runtime 1.1

-jfif: любой редактор изображений или web-браузер

-jnlp: Oracle Java Web Start, а так же любой

текстовый редактор

-jp2: Adobe Photoshop, Adobe Photoshop Elements,

ACD Systems ACDSee, ACD Systems

Canvas,CorelDRAW Graphics Suite

-jpa: JoomlaPack eXtract

-jpe: IrfanView, XnView, ACDSee, ACD Systems

Canvas, Paint.NET

-jpeg: IrfanView, XnView, ACDSee, ACD Systems

Canvas, Paint.NET

-jpg: XnView, ACDSee, Paint.NET, Adobe Photoshop

-js: Adobe Dreamweaver, любым браузером и

любым текстовым редактором

-kar: Nullsoft Winamp, Light Alloy,KarMaker,

KarPlayer, Recisio KaraFun

-key: любым текстовым редактором

-kml: Google Earth, Merkaartor, SketchUp,

Rhinoceros (Rhino)

-kmz: Google Earth, Merkaartor, SketchUp,

Rhinoceros (Rhino)

-kwm: WebMoney Keeper Classic

-lay: Splan, Sprint Layout

-lic: Bred 3, Блокнот, Notepad++, PSPad editor

-lng: любой текстовый редактор, а так же Nullsoft

Winamp, Adobe Acrobat, Audiograbber, AVG Anti-

Virus

-lnk: Двойным щелчком мыши, Flint LinkInfo

-log: PSPad editor, Notepad++, Bred 3,Microsoft

Word, блокнот

-lossless: winamp

-lrf: Sony Reader Library, Calibre, BookDesigner,

Makelrf, Canon Book Creator, Microsoft C/C++

-lst: Microsoft Visual Studio, а так же любым

текстовым редактором (блокнот)

-ltx: S.T.A.L.K.E.R

-lvf: программным обеспечением для web-камер

Logitech

-m2ts: Sony Picture Motion Browser (PMB), CyberLink

PowerDVD, VideoLAN VLC Media Player , Media Player

Classic, Nero Show Time

-m3d: CorelDRAW Graphics Suite, Аскон КОМПАС,

Sony EverQuest,Rockstar Games Grand Theft Auto:

Vice City, Aurora 3D Text & Logo Maker

-m3u: Nullsoft Winamp, VLC Media Player ,

RealNetworks RealPlayer, KMPlayer, Apple iTunes

-m4a: Nullsoft Winamp, VLC Media Player ,

RealNetworks RealPlayer, KMPlayer, Apple iTunes

-m4b: Nullsoft Winamp, VLC Media Player ,

RealNetworks RealPlayer, KMPlayer, Apple iTunes

-m4v: Nullsoft Winamp, VLC Media Player ,

RealNetworks RealPlayer, KMPlayer, Apple iTunes

-map: Atlas MapMaker

-max: Autodesk 3ds Max

-mcd: PTC Mathcad, SMathStudio Desktop

-md5: IsoBuster, MD5Summer, MD5 Checker,

SlavaSoft FSUM

-md80: IsoBuster, MD5Summer, MD5 Checker,

SlavaSoft FSUM

-mdb: Microsoft Access, Microsoft Visual Studio,

Microsoft Excel, OpenOffice.org Base, MDB Viewer

Plus

-mde: Microsoft Access

-mdf: WinRAR, Alcohol 120%, UltraISO, DAEMON

Tools, IsoBuster

-mdi: Microsoft Office Document Imaging

-mdl: MathWorks Simulink

-mds: Alcohol 120%, DAEMON Tools, CyberLink

PowerDVD, UltraISO, MagicISO

-mdx: DAEMON Tools, Astroburn

-mht: Opera, Internet Explorer, Microsoft Word,

Kingsoft Writer, WizBrother WizHtmlEdito

-mif: SISContents, Mif Manager (требуется Pyton),

SmartSIS, miftool (требуется Pyton)

-mim: Microsoft Outlook, Microsoft Outlook Express,

StuffIt Deluxe, WinZip, ALZip

-mkv: Windows Media Player с плагином Matroska

DirectShow, Media Player Classic, Zoom Player,

MPlayer, VLC Media Player

-mobi: FBReader, STDU Viewer, Calibre, Mobipocket

Reader, Amazon Kindle

-mod: FBReader, STDU Viewer, Calibre, Mobipocket

Reader, Amazon Kindle

-mov: Apple QuickTime Player , Windows Media

Player, Media Player Classic, MPlayer, Roxio Creator

-mp3: Nullsoft Winamp, AIMP, Media Player Classic,

VLC Media Player ,Windows Media Player

-mp4: Nullsoft Winamp, AIMP, Media Player Classic,

VLC Media Player ,Windows Media Player

-mpeg4: Media Player Classic, Zoom Player, Windows

Media Player, RealNetworks RealPlayer, VLC Media

Player

-mpg: Media Player Classic, Zoom Player, Windows

Media Player, RealNetworks RealPlayer, VLC Media

Player

-mpo: Adobe Photoshop, CyberLink PowerDVD,

Stereomerger, StereoPhoto Maker, STOIK Imaging

Imagic

-mpp: Microsoft Project, Seavus Project Viewer,

Stand By Soft RationalPlan, Housatonic Project

Viewer, KaDonk LiveProject Viewer

-mpq: MPQ Editor, StormLib Library, SCMDraft, Addon

Studio for World of Warcraft

-mpqe: MPQ Editor, StormLib Library, SCMDraft

-mq4: MetaQuotes MetaTrader

-msg: Microsoft Outlook, The Bat!, Priasoft MSG File

Viewer and Assessor, Encryptomatic MsgViewer Pro,

Pegasus Mail

-msi: Microsoft Windows Installer, 7-Zip, Universal

Extractor

-mso: Microsoft Outlook

-msu: Microsoft Windows Update

-mtf: Klyaksa.net MyTest

-mts: CyberLink PowerDVD, Ulead VideoStudio, Corel

WinDVD Plus Blu-ray, Sony Vegas Movie Studio

Platinum, Sony Vegas Pro

-mus: Finale NotePad - бесплатна, Finale, SmartMusic

-mxf: Avid Media Composer, Adobe Premiere, VLC

Media Player, Sony Vegas Pro, Pavtube Video

Converter

-mxl: 1С: Предприятие, 1С:Работа с Файлами

-nbf: WinRAR, NBF Parser, NBU Parser, Nokia Suite

-nbu: Nokia Suite, Nokisoft Noki, NbuExplorer, NBU

Parser, Jumping Bytes Mobile Master

-nef: XnView, Adobe Photoshop, ACDSee, Nikon

photo RAW, Nikon View

-nes: VirtuaNES , Nestopia , NesterJ , FakeNES , Jnes

-nfo: GetDiz, NFOPad, Compact NFO Viewer,а так же

любой текстовый редактор

-nfs: OpenVMS

-nm2: Навител Навигатор

-nm3: Навител Навигатор

-npf: NTI Backup Nowб NTI DriveBackup!

-nrg: Nero, UltraISO, IsoBuster, MagicISO

-nrw: Adobe Photoshop Elements, Corel PaintShop

Pro, Nikon Transfer, Nikon ViewNX, Nikon Capture NX

-o3d: javascript API

-obb: Google Play Developer Console, 7-Zip, WinRAR

-obj: Rhinoceros (Rhino), Autodesk 3ds Max,

Autodesk Maya, Blender, Autodesk AutoCAD

-odg: OpenOffice.org, LibreOffice

-odp: Apache OpenOffice (OpenOffice.org) Impress,

LibreOffice Impress, Microsoft PowerPoint 2010 и

позднее

-ods: OpenOffice.org Calc, Microsoft Excel,

LibreOffice Calc, IBM Lotus Symphony, StarOffice

-odt: OpenOffice.org (Writer), LibreOffice, Corel

WordPerfect Office, AbiWord, TextMaker

-ogf: OGF Master

-ogg: Nullsoft Winamp, AIMP, MPlayer, BSplayer, VLC

Media Player

-oms: OperaVini PC Helper

-one: Microsoft OneNote

-orf: Adobe Photoshop, Adobe Photoshop Elements,

CorelDRAW Graphics Suite, ACD Systems Canvas,

ACDSee

-ost: Microsoft Outlook, Free OST Viewer, Microsoft

OST Integrity Check Tool, Remo Convert OST to PST,

SysTools OST Recovery

-otd: OpenOffice

-ozfx3: OziExplorer, Androzic, DeMapper

-p7e: 7-zip

-p7s:7-zip

-pages: Apple Pages - для MacOS, EZ Freeware Free

Opener

-pak: WinRAR, WinZip, Leinen PAK Explorer, Pak

Explorer, Sprite Explorer

-part: Mozilla Firefox, Free Download Manager,

Go!Zilla, FlashGet, DrSiRiUs eMule Plus

-pat: Adobe Photoshop, ACD Systems Canvas, Corel

PaintShop, Corel WordPerfect Office, GIMP

-pbo: BI Tools 2

-pbp: PBP Unpacker, PSP Brew, psx2psp, EBOOT2ISO

-pcb: Altium Designer, Altium Designer

Viewer (бесплатна), Altium P-CAD, P-CAD 2006

Viewer (бесплатна), Cadence OrCAD

-pck: Microsoft System Center Configuration

Manager, Microsoft Preload Package Tool

-pcx: Adobe Photoshop, Adobe Photoshop Elements,

Adobe Premiere, Adobe Illustrator, Inkscape

-pdb: Palm Desktop, XnView, Calibre, Онлайн

конвертер в PDF, iSilo

-pdf: Foxit Reader, STDU Viewer, Adobe Reader,

Adobe Acrobat, Adobe InDesign

-pdn: Paint.NET, Chasys Draw IES

-pdo: Pepakura Designer, Pepakura Viewer

-php: Открыть и выполнить можно на сервере с

установленным php., Denwer

-pkg: Apple Installer, CharlesSoft Pacifist

-pln: Adobe InDesign

-plt: IMSI TurboCAD, Autodesk AutoCAD, CorelDRAW

Graphics Suite, Corel WordPerfect Office, IrfanView

-pmd: Adobe PageMaker, Adobe InDesign

-png: Adobe Photoshop, Adobe Illustrator, ACDSee,

-IrfanView, Paint.NET

-pot: Microsoft PowerPoint, Kingsoft Presentation

-pps: Microsoft PowerPoint, Microsoft PowerPoint

Viewer, OpenOffice.org, Ability Office

-ppsx: Microsoft PowerPoint 2007 и позднее,

OpenOffice.org, Ability Office Presentation, Microsoft

PowerPoint Viewer, Kingsoft Presentation

-ppt: LibreOffice Impress, OpenOffice.org Impress,

Corel WordPerfect Office, Ability Office, Nuance

OmniPage

-pptx: LibreOffice Impress, OpenOffice.org Impress,

Corel WordPerfect Office, Ability Office, Nuance

OmniPage

-prn: Free Raw Print, AllWeb FastPrint

-prt: Autodesk Inventor, Blender, PTC Creo

(Pro/ENGINEER), Okino Computer Graphics

PolyTrans, Adobe Acrobat

-ps: Adobe Illustrator, Adobe Photoshop, Adobe

Photoshop Elements, ACD Systems Canvas, ACDSee

-psd: Adobe Photoshop, Adobe Photoshop Elements,

Adobe InDesign, ACDSee Photo Manager, Corel

PaintShop

-pst: Microsoft Outlook, Microsoft Outlook Express,

MailNavigator, Microsoft Exchange Server, BitDaddys

Email Open View Pro

-psw: TextMaker Viewer

-pub: Microsoft Office Publisher, Adobe InDesign с

плагином PUB2ID, CorelDRAW

-pwi: Microsoft Office Word, Microsoft Office OneNote,

Microsoft Works

-pws: ValuSoft Print Workshop

-qdb: Intuit Quicken

-qhf: QIP 2012, QIP Mobile, QIP PDA, QIP 2010, QIP

Infium

-qlitedb: SQLite, SQLite Database Browser, Navicat for

SQlite, Sqliteman

-qrp: Zyl Soft RepView, Dr. Regener QuickReport-

Viewer, Responsive Software QRP Viewer, 3Engine

QuickReport Viewer

-raf: Adobe Photoshop Elements 8, Adobe Photoshop

CS5

-ram: Real Media Player

-rar: WinRAR, 7-Zip, WinZip, ZipZag, PeaZip

-raw: Adobe Photoshop, Adobe Photoshop Elements,

XnView, JRiver Media Center, Dcraw

-rcf: SonicWALL Global VPN Client

-rdf: Mozilla Firefox, Oxygen XML Editor, Mozilla

SeaMonkey, Altova XMLSpy, Liquid XML Studio

-rec: Squared 5 MPEG Streamclip, VideoLAN VLC

media player,Elecard MPEG Player,VideoReDo

-rem: Research In Motion BlackBerry Desktop

Manager

-res: Delphi, C++ Builder

-rms: RealNetworks RealPlayer

-rmvb: RealNetworks RealPlayer, VLC Media Player,

Media Player Classic, Adobe Premiere, Quicktime PRO

-rom: Nemu64, Project64, UltraHLE, Mupen64,

SupraHLE

-rpt: Bred 3, Notepad++, PSPad editor, Блокнот

-rsc: Nokia Symbian rcomp

-rtf: Windows WordPad

-run: Запустить в Linux командой ./filename.run

-rw2: Adobe Photoshop, Adobe Photoshop Elements,

ACD Systems Canvas, ACDSee, Corel PaintShop

-sat: Spatial ACIS Modeler, IMSI TurboCAD, Autodesk

AutoCAD, Ashlar-Vellum Cobalt, Argon или Xenon,

Kubotek CADKEY

-sav: Half-Life 2, Дюна, Другая игра, создавшая

файл

-sch: P-CAD Schematic, P-CAD Viewer

-scm: ScreenCam

-scs: Bus Driver, SCS Prism3D, WinRAR, Scs extractor

-sde: SDE Drumbeat Exported Data, SDE Steganos

Disk Encryption File

-sdf: dBASE, Pervasive PSQL, Rosenvick AspireGold

-sfo: PBP Unpacker

-sgdt: Различные игры FreeSweetGames

-shs: Microsoft Office Word, Microsoft Office Excel

-shx: Autodesk AutoCAD

-sid: MrSID

-sig: Microsoft Outlook, Microsoft Outlook Express,

QUALCOMM Eudora, Crypto Pro

-sis: Nokia Suite, UnSIS (UnMakeSIS), Easy SIS

Creator, Palm OS Emulator, SISContents

-skp: SketchUp, Rhinoceros (Rhino), IMSI TurboCAD

-sldprt: Dassault Systemes SolidWorks, Autodesk

Inventor Fusion, Adobe Acrobat

-smc: ZSNES, no$sns, Snes9x, SnEM, SNEeSe

-smd: Gens, Gens Plus!, Fusion, HazeMD

-snp: Microsoft Access

-spb: Samsung Kies

-spl: Splan

-spl7: Splan

-spr: Microsoft Visual FoxPro

-spx: AIMP, VLC Media Player, Apple QuickTime

Player с плагином XiphQT , Windows Media Player с

фильтром DirectShow, Foobar2000

-sql: Microsoft Access, Microsoft Visual Studio, Adobe

Dreamweaver, Nvu, Navicat for MySQL

-sqlite: SQLite, Sqliteman, Navicat for SQLite,

Database Master, Autodesk AutoCAD Map 3D

-srt: SubRip, SRT2SUP, SubtitleCreator, Subtitle Edit

-step: КОМПАС, IMSI TurboCAD, Autodesk Inventor

Fusion, Rhinoceros (Rhino), Dassault Systemes

CATIA или DELMIA

-stl: Autodesk Inventor, Dassault Systemes

SolidWorks, IMSI TurboCAD, Rhinoceros (Rhino),

Blender

-sto: PRO100

-stp: CATIA, QuickStep, Delcam Exchange, ideaMK

STP Viewer, LKSoft IDA-STEP

-sub: CyberLink PowerDVD, MPlayer, Universal Subtitle

Viewer, SoftNI Subtitler Suite

-svg: Adobe Flash Player, Corel PaintShop, Microsoft

Visio, Inkscape, Merkaartor

-swf: Opera, Mozilla Firefox, Google Chrome, Internet

Explorer, Adobe Flash Player

-sys: Microsoft Windows, MS-DOS, OS/2

-tar: WinRAR, WinZip, 7-Zip, AlZip, StuffIt Deluxe

-tdb: eBay Turbo Lister

-tec: FileViewPro.

-tga: Adobe Premiere, ACDSee, Adobe Photoshop,

Inkscape, Apple QuickTime Player

-themepack: WinRAR

-thm: Microsoft Windows Photos, Microsoft Windows

Photo Viewer, ACD Systems ACDSee

-tib: Acronis True Image

-tif: XnView, Corel PaintShop, CorelDRAW Graphics

Suite, Adobe Photoshop, Adobe Illustrator

-tiff: XnView, Corel PaintShop, CorelDRAW Graphics

Suite, Adobe Photoshop, Adobe Illustrator

-tmp: текстовый редактор

-torrent: utorrent

-tpl: Блокнот, Bred 3, PSPad editor, Notepad++

-ts: DRD Systems VideoReD, VobEdi, Squared 5 MPEG

Streamclip

-ttf: FontCreator, Windows Font Viewer

-txd: VC TXD Viewer, TXD Builder, Vice TXD

-txt: Блокнот, PSPad editor, Notepad++, Bred 3 и

другие текстовые редакторы

-udf: IsoBuster, UltraISO, Nero, 7-Zip, MagicISO

-udx:программой создавший файл

-uif: MagicISO, PowerISO, gBurner, UIF2ISO, UIF to

ISO Converter

-undf: Media Player Classic, Windows Media Player,

CyberLink PowerDVD, K-Lite Mega Codec Pack

-vbs: Microsoft Visual Studio, Adobe Dreamweaver

-vcd: H+H Software Virtual CD , IsoBuster, PowerISO,

Roxio Creator NXT Pro, WinMount

-vce: Visual CertExam Suite

-vcf: Nokia Suite, Palm Desktop, QUALCOMM Eudora,

Open Contacts, Beiley Handy Address Book

-vdf:всеми продуктами Avira

-vhd: IsoBuster, Virtual Server, Microsoft Virtual PC,

WinMount

-vid: Windows Media Player, Apple QuickTime Player ,

QTUM AVI Converter и другие видео плееры

-video ts: JetAudio7

-visio: Microsoft office

-vmdk: VMware Workstation, VMware Player, VMware

Server, VMware Fusion, Sun xVM

-vmg: Nokia Suite, ABC Amber Nokia Converter,

Блокнот

-vnt: блокнот, а так же любой текстовый редактор

-vob: Media Player Classic, Windows Media Player,

Zoom Player, MPlayer, VLC Media Player

-vol: Dragon UnPACKer

-vp6: On2 Technologies Flix for Flash video, Adobe

Flash Player 8 или позднее, Windows Media Player с

кодеком Storm Codec, VLC Media Player, Media

Player Classic

-vpk: GCFScape, Gibbed's VPK Extractor, VPK.exe из

набора Left 4 Dead Authoring Tools

-vrf: Flagship Industries Ventrilo

-vro: VLC Media Player , Apple QuickTime Player с

плагином, MPEG-2 Playback, CyberLink PowerDVD,

Corel WinDVD

-vsd: Microsoft Visio, Visio Viewer, Visio Document

vvf: VVFPlayer

-w3g: Blizzard WarCraft III

-wad: ZipZag

-wav: Windows Media Player, Media Player Classic,

Apple QuickTime Player , Nullsoft Winamp, AIMP

-wbfs: WBFS Manager, WiiJManager, Wii Unscrambler,

Wii Game Manager, Wii Backup Manager

-webarchive: Apple Safari

-webm: любой браузер

-webp: Adobe Photoshop, Google Chrome, Opera,

Logipole Konvertor

-wim: 7-Zip, PeaZip, GImageX, WinMount, Microsoft

ImageX

-wlmp: Киностудия Windows

-wmf: Nero

-wmv: Media Player Classic, Windows Media Player,

CyberLink PowerDVD, Roxio Creator

-wmz:7-Zip, WinRar

-wotreplay: Wargaming.net World of Tanks, WOT

Replays Manager, WOT Replay Parser

-wps: Microsoft Works , Microsoft Office Word,

LibreOffice Writer

-wrl: Blender, IMSI TurboCAD Deluxe, Autodesk Maya,

FreeWRL

-wv: WavPack, AIMP

-xap: Internet Explorer,, Mozilla Firefox

-xls: Microsoft Office Excel

-xlsx: Microsoft Office Excel , Microsoft Excel Viewer

-xml: Oxygen XML Editor, Microsoft Visual Studio,

Microsoft Excel

-xpart: XPlayerX

-xpi: Mozilla Thunderbird, Mozilla Firefox,Mozilla

SeaMonkey

-xps: Mozilla Thunderbird, Mozilla Firefox, Mozilla

SeaMonkey

-xsd: Pattern Maker for cross-stitch

-xsl: FileMaker или любая программа,

поддерживающая таблицы стилей XML

-xvid: Zoom Player, Media Player Classic, MPlayer,

VLC Media Player

-xz: 7-Zip

-zip: 7-Zip, WinRar

1cd :1С.

-3ds : Autodesk 3ds Max 2011, MeshLab, IMSI

TurboCAD Deluxe 18, Google SketchUp.

-3ga : Media Player Classic, VLC Media Player,

-7z : 7-Zip, WinRAR, PeaZip, StuffIt Deluxe 2009,

WinZip 12 Pro, ZipZag, ZipGenius, ConeXware

PowerArchiver.

-aac: Media Player Classic, Windows Media Player,

Winamp, AIMP.

-abr: Adobe Photoshop CS4, ABR Viewer, ABRView

-ac3: Nullsoft Winamp Media Player 5.6, Nero

Multimedia Suite 10, Microsoft Windows Media Player,

CyberLink PowerDVD 10 Mark II

-adf: ADF Opus, WinUAE, WinFellow, Cloanto Amiga

Forever

-ai: Adobe Illustrator, Adobe Acrobat, Adobe

Photoshop, IMSI TurboCAD, ACD Systems Canvas

-air: Adobe AIR, Adobe Flash

amr: AMR to MP3 Converter, AMR Tool, Mobile AMR

Converter

-ape: Winamp

-app: Открывается на телефонах ОС Symbian

-arc: WinAce, WinZip 12 Pro - Free Trial, Acubix

PicoZip, ConeXware PowerArchiver, Smith Micro

Stuffit Deluxe

-arf: Network recording player