Here are some useful mods and SVN links for things we use on the server:
-Wiremod
https://wiremod.svn.sourceforge.net/svnroot/wiremod/trunk/wire/
-Wire Extras
http://svn.dagamers.net/wiremodextras/trunk
-SBEP (Note: Open up the folder, take out the contents and put them in addons)
http://sbep.googlecode.com/svn/trunk/
-Stargate (User name/Password: anon/anon, Read the Readme.txt)
http://svn.daggeringcats.com/stargate
-PewPew
http://divranspack.googlecode.com/svn/trunk/%20divranspack/PewPew/
Link sources: http://wiki.garrysmod.com/?title=SVN_Links