Tim3Game's European Signs Pack (originally Tim3Game's Slovak Signs Pack) for MTS (Minecraft Transport Simulator)
Rainbow Stuff! A mod with increasing modules and lots of (no) potential. You can go to the Rainbow Dimension, you can make Rainbow Armour, make a house out of Rainbow Blocks.
Creative Tab Randomiser by Chocohead
The creative tab order is not terribly exciting. What would make it more exciting is change. Lots and lots of change.
The Pineapple Mod by Masterzach32
The Pineapple Mod is a mod that adds pineapples to Minecraft. Pineapples spawn on sand in clusters (like pumpkins) and can be broken to get pieces of the pineapple block. Build tools and Armour with pineapples and rule your world with the most powerful material in Minecraft!
Project Lambda by Melonslise
Project Lambda is an ambitious project aiming to re-create the classic shooter masterpiece, Half-Life, often debated to be the best game of all time that revolutionized its genre, in Minecraft.