Demo Download - A list of places to download the Half-Life demo. - http://www.gameaholic.com/games/halflife/demo/
Steambans - Project to prevent online cheating. Includes forums, downloads and a list of protected servers. - http://www.steambans.com
Half-Life Gaming - Statistics and forums for gamers that play on the wshost.net TFC and CS servers. - http://hl.wshost.net/
Half Life Top 200 - Site directory ranked by user votes. - http://www.gamesites200.com/halflife/
Sierra: Half-Life - Official site includes game overview, news, online game registration, support, links, and online ordering. - http://half-life.sierra.com/