FPS++
Website: http://www.minecraftforum.net:80/topic/1350464-147fishtacos-mods-fps-lava-decay-fog-key-and-more/Increase your FPS by messing with Minecraft's Cos and Sin functions. It shrinks the lookup table down to a more reasonable size.
For Minecraft 1.5
FPS15
fps15.zip
1e662b3ebf123a50b011079f073b9ad97375322b580033102c5eb965ac23d962
For Minecraft 1.4.7
FPS1.4.6
FPS146.zip
cd7560ee905d74a099941e22ffb490ae02eaa3a4b9507ab61b1bb6ec0f3f79e0
For Minecraft 1.4.2
FPS142
fps142c.zip
ffe9ae3c59d76ec80cf69c5eb47e621c1b15bc9cd18a1d1e829191a3301c9f92
For Minecraft 1.3.2
FPS132
FPS132c.zip
c72fd97d03c0514c686f7aea974d0bcc4d71ae9a8d297c3fcf33f3b54ba9da63
For Minecraft 1.3.1
FPS1.3.1
FPS131.zip
654cf84477fbce52705f42f7093af688ab403a7be5d61a7e5643c883e640a687
For Minecraft 1.2.5
FPS125
gk.class
76c58c7206b8f8a037f5a79ed845ab2bc595cde996da2827cecbdcf38bb53982