Optifine

Extreme Lag

For those of you that don't already have Optifine, this is a mod that is likely to change your minecraft experience. Optifine doesn't add any cool new creatures or block to your game, but what it does do is give your FPS a huge boost. Have you ever been bothered by a stuttering or laggy Minecraft? Well Optifine can help, it delivers huge boosts to your FPS, and even speeds up world loading. If you ever feel that your minecraft is running too slowly, I would definitely recommend this mod.

Download:
Optifine