Olly has created this SourceMod extension so that your server can communicate with other servers, and send and receive data between them. This can be used for downloading through HTTP, creating an irc bot, querying another game server..

Changelog for 2.0:

• Fixed lots of bugs
• Fixed problem with the way i setup the callbacks (thanks bailo)
• Changed the way that the natives work, less 'set callack' natives, so it works much better
• The SocketReceive native now has the data that was got from the socket in one of the paramaters, instead of needing to specify a global string of a fixed size.
• Compiled for Orange-Box

Server owners can grab it now from here.