Random Stuff Mod by David5886
This mod adds in a bunch of crazy/random things into the game of Minecraft
InsaneCraft by Hofboy
This mod adds a new way to fight in the endgame. Using nether stars you can craft extremely powerful weapons and armour.
SchopCraft by Schoperation, See README for full list
SchopCraft is a mod influenced heavily by the EnviroMine mod, the Tough As Nails mod, and the external game Don't Starve. It's intended to make Minecraft harder, cooler, and... something in-between.
CageCraft by NiallTheAwesome, MCreator
CageCraft, the mod that adds Nicolas Cage to Minecraft! Update 1.0.2 + Nicolite Ore and Nicolite Gem, that can be used to make a Nicolite set of tools (armour coming soon) + The bunny from the movie Con Air. + A gun that uses the bunny as ammo (currently shoots arrows but uses the bunny as ammo) + Nicolas Cage mob now has a Nicolite sword in his hand.