My freebuild server, "FishSlap's Build Anything" is pretty public. It's not dedicated but many people have joined and built something. I have the following addons installed.
L4B Gun Mod (for my other servers)
Custom Tags ( [Host]FishSlap)
Duplicator
Moderator Addon
Block Addons
Guns (Sniper, etc etc)
RTB (Not the real version)
Any other addon suggestions? Tell me!