Which Software Can Open .eps and .ai Files?

EPS and files can be opened or imported with following applications (to name just a few)...

Vector editors like:
Adobe Illustrator
Corel Draw
Xara Xtreme
Inkscape

Raster image editors like:
Adobe Photoshop
Corel PhotoPaint
GIMP

Desktop publishing apps like:
Adobe InDesign
Quark Xpress

3D software like:
3D Studio Max
Cinema 4D
Swift 3D

Office Apps like:
Microsoft Office
Open Office

AI is native Adobe illustrator format and can be opened or imported by majority of applications from Adobe Systems Incorporated and majority of 3D applications and raster image editors.

What Are The Most Common Vector Formats?

Most common vector formats are .eps, .ai, .svg and .wmf. EPS is most commonly used vector format and it can be opened with variety of popular applications. Majority of files on Vectorportal are in .ai and .eps format.

What Is Vector Graphics?

Vector graphics use geometrical formulas to represent images. Vector images have many advantages over raster images. Vector is resolution independent meaning you can resize 100x100 pixel image to 100x100 inches image without any loss of quality. That is not possible with raster images. In addition, images stored as vectors look better on devices (monitors and printers) with higher resolution, whereas raster images always appear the same regardless of a device's resolution. Another advantage of vector graphics is that representations of images often require less memory than raster images do.

More on vector vs. raster graphics on following links:

SignIndustry: Vector vs. Raster Graphics
Wikipedia: Vector graphics

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Leaves lemon leopard life light line lines Links lion lips liquid Loch Ness lock Logo logo design logo graphics Logo Templates Logo-Design logos logotype logotype design love Love Vectors luxury car macaw Magazines man Marilyn Monroe marketing marriage mascot mask medieval Meeting Merchandise mermaid Message microstock military mirror modern Money monkey monkeys monster moose More Info morgue mouse muscles music Music Vectors musician Natal nation national native natural nature Natureza net network New Symbol indian Currency night nocturnal Note Notice numbers oak Obama object Objects Objetos ocean Office Office Suitcases old Oman orange organic Organize Ornamentos Others outdoor outline outline vector Outros owl pack Packs page Paint Brush painter painting panther Paper Paperclip parchment parrot Partnership Party Vectors pattern Patterns peeling label peeling sticker Pen Pencil people People Vectors person Personal perspective Pessoas pet Photoshop Pin ping vector background designs pink pink vector pint pirate pisces pistol Place play Plugins point Pointer poisonous police police officer polka polygonal Pop-Art poplar portrait Post Posters Pound pray prayer premium presentation president Price Price Tag prince propaganda protest public domain puma purple Push-pin quality quick rabid radial Raindrop rapier rasta rat rays red religion religious Religious Vectors republic resolutions retro Retro Vector Backgrounds Retro Vectors Reviews revolution revolver ribbon rich ride river rodent romance Rótulos round Rss icons sailor Sale Sale Label Sale Tag Sale vector sales Salvador Dali Samlpe Text Santa Santa Claus say scary scorpion scribble scroll sea sea animal seamless Seamless Vector Patterns see Serbia Serbian set Shake shape shapes share sharp sheets shine Shiny ship Shopping Shopping Trolley Shopping Vectors shot shoulder sign Signpost Silhouettes Silver simple singer skeleton ski resort skiing skull Skull Vectors slow small smile smiley snake snow snowflake snowflakes soccer Software soldiers solid song sound speak speech speed spider spirit split sports car Sports Vectors spread squid stack Standing star stars Stars and Stripes state Stationaries Stationery statistics stats steel sticker stickers stock stock vector stop store Street-Art strength stripe stripes Success sun sunbeams sunset sunshine Supermarket SVG Swatches swirl Swiss Switzerland swooshes sword swords symbol Symbols Tag tail talk tattoo Tattoo Vectors Teamwork teddy tell template text texture thinking Thought tiger tiles Tips Title vector designs Tools toy tradition traditional trail transparent transport Transportation Vectors tree Trendy tribal Tribal Vectors Trolley tropical tuna Turkey turtle Tutorials Typography U Pin UK US USA Usher V. Card Valentine Valentine's day vector Vector Abstract Background Vector Backgrounds Vector Banners Vector birds Vector Business Cards Vector Clip Art vector file vector format Vector Graphics FAQ Vector Icons vector logo design Vector Material vector pack Vector Portraits Vector Resources Vector Rotation vector set Vector Signs Vector Silhouettes Vector Stickers vector stock Vector Symbols Vector Templates Designs Vector Valentine's Day Vector Word Clouds Vector-Art Vector-Artists Vector-Drawing Vector-Labels Vector-Posters Vector-Templates vehicle Vehicles Vectors vertical Videos viking vintage vinyl Violet visiting Visiting Card Designs Visiting Cards visual visual identity vitamin vivid wall Wall Fit wallpaper war warm warning warp warped warrior water wave waves waving wavy Way weapon weapons web website Website Elements wedding dress wheels white wild wild animal wine wing wings Wings Vectors winter woman women Wood worn wrapped Xmas yacht yellow yin yang zodiac