OptiFine Ultra

Optimizes Minecraft graphics so that it looks better and runs faster (Multi-Core CPU support)

OptiFine Light

Optimizes Minecraft graphics so that it looks better and runs faster (better FPS only - for slower computers)

Where are all the 1.7.x Mods?

Right! Minecraft 1.7.2 has been out for a month & 1.7.4 has also just been released, where the hell are all the mods for them?

Too Many Items

Gives you unlimited resources.