So i read the Custom Font SDK guide to make custom fonts and i understood it and everything, but i don't know where to find the actual compiler.  Can anyone link me to it?

correlation was never finished. there are betas available here, but you'd probably be better off checking out batlib or grammer from xeda here, as they are actively maintained still.

EDIT: oh, and correlation doesn't have a separate compiler; it's a flash app that uses hooks to extend the functionality of BASIC programs.

there are links under Major Community Projects on the Forum tab, we have a search engine (although be sure to use it from the home screen), and there is a grammer link in xeda's signature just above.

here, though:
batlib
grammer

Yeah, I use zstart and the fonts also stay on ram-clear which is pretty cool