A computer icon is a small pictogram. Icons were first developed as a tool for making computer interfaces easier for novices. Icon-driven interfaces were later popularized by the Appleand Microsoft operating environments.

Icons usually ranges from 16 by 16 pixels up to 128 by 128 pixels.They may represent a file, folder or application. Today, the icon can represent anything that the users want it to, like any macro command or process.

A good icon must be original, distinctive and tiny. It must be useful on a wide variety of monitors set at different resolutions.

bartelme.at

In many cases you have to provide different options or features for different nationalities.

flags.blogpotato.de

A great collection of flag icons.

famfamfam.com

“Flags” are 247 icons — in GIF and png formats — representing most countries in the world as small pixel icons.

icondrawer.com

One of the largest free collection of flag icons. 243 free flag icons representing countries and unions all over the world. jpg format. Sizes : 16×16, 24×24, 32×32, 48×48.

jfitz.com

Good set of small, consistent flags collection. Free to copy.

studiotwentyeight.net

World flags icon set with over 260 flags.

flaggr.com

Flaggr offers free high-quality icons of flags of every country in the world for use on your website or application.

justfreegraphics.com

Beautiful free icon collection.

clip-art.kaboose.com

World flag icon set. For free use.

iconspedia.com

Amazing flag icon collection for free.

trendsmania.com

Free web 2.0 style flags, 32×32 pixels png. Filenames follow ISO 3166-1 alpha-2 country codes.

silentrage1.deviantart.com

Iphone Flag Icons collection.