Performance

Speed up immediate mode rendering in Minecraft

BetterF3 is a mod that replaces Minecraft's original debug HUD with a highly customizable, more human-readable HUD.

Optimization mod that focuses on things other than rendering

Improves performance by tweaking mob despawn rules. Say bye to pesky unintentional persistent mobs.

Performance improvements for vanilla AI, with the ability to turn off certain AI behaviors

Pre-generates chunks, quickly and efficiently

Unofficial Fork of CaffeineMC's "Phosphor", made to work with FML