Best Gmod Addons?

The ULX Admin Mod is the best! I've used it on my server for almost a year now, and everyone is enjoying it more! As a huge fan of Valve Cut Content, I especially love these:
Half-Life Alpha Pack (Contains Playermodels, NPCs, Weapons, and Props from the Half-Life Alpha 0.52 release): https://steamcommunity.com/sharedfiles/f...=614188438
Half-Life 2 Beta Playermodel Pack (Contains every playermodel from the Half-Life 2 Beta Leak as well as NPCs [Perfect for Roleplaying]): http://steamcommunity.com/sharedfiles/fi...=619791481