I'm looking for old mods that don't work anymore. For August's stream I want to update some, drop ideas here.

Mobs World

IRC (freenode): 
     Stop wasting your time building pixel art, go out and conquer the animal kingdom and display your trophies in your very own vivarium/zoo.
     This server hosts a wide array of mobs, which can all be captured and tamed. You'll need an enclosure to keep them from wandering too far, and so you can rub your amazingness in everybody's faces. :)
     In addition to capturing hostile mobs you can tame them, with a tool, and have them fight for you.