HLSW, Half-Life Server Watch, is a game administration tool which is capable of remotely administrating Half-Life , and it's modifications, game servers as well as allowing a user to view who was playing in the game server without actually...Discontinued
The program is no longer updated. Last version, 184.108.40.206, released in June 2011, can be still downloaded from the official website.
GSRC is a HLSW-like tool to help administrating game servers.Discontinued
The website is dead, but an archived version can be accessed via Internet Archive: https://web.archive.org/web/20150925084803/http://gsrc.chatcom.net/