Yet Another Leather Smelting Mod by airbreather, skidznet
Adds recipes to allow smelting Rotten Flesh to Leather. It's been done before, I just haven't seen it for 1.6.4. Idea taken from EpicBlargh's Rotten Flesh to Leather mod. Patchwork Flesh icon by skidznet.
OP Diamond Items by WetNoodle
This mod, just like the title suggests, adds OP items to the game. These items include armor, tools and weapons.