Natural Selection -  .

AbsolutSwede - - Natural selection customization and skins. Site contains models, sounds and projects.

Evolution - - Contains news, members and downloads.

Modified Selection - - Includes list of active servers and forums for players.

Natural Selection Mod Review - - Rates game in terms of sound, graphics, game playability and in terms of multiplayer fun. From Gamershell.

Number-7 - - Archive of maps with downloads, reviews and a forum.

Rattrap's Natural Selection Site - - With Natural Selection related downloads, wav files, and information on the Half Life Sound Selector (HLSS).

Team KB - - News, public server statistics, clan matches, downloads, maps, and models.

United Kingdom Natural Selection - - News, articles, reviews and opinions.

Natural Selection 2.0 (PC) - - From Boomtown. Takes a closer look at the mod where aliens can eat people and where humans must prevent it. (August 4, 2003)