Great addons/mods for a Sandbox server?

I was wondering a list of Addons or Mods that would be great for a Sandbox server. I already have ULX Admin Mod, all and working and I’m about to install wiremod into it. So what are some other great ones like the two I’ve already spoke of?

SProps - http://www.facepunch.com/showthread.php?t=1201734

Just a small list of some decent tools:

Fin Tool
Buoyancy tool
PAC 3(?)

my chat tag addon
http://forum.facepunch.com/showthread.php?t=1244672