Originally Posted by Jope
MCP with as few features + patches turned on as possible.
Can't live without those. Everything else is just eye candy.
I have since changed my opinion and given up on MCP. Too buggy. MultiCX has taken its place and my machine's stability increased a lot.
In addition to those, off the top of my head:
sysihack for the 3d gadgets (yes, eye candy)