Nintendo 64 Code Center-  Here you can find Nintendo 64 cheat codes for every game on the N64 ever made.  I use this code center every day to look up codes for the N64.  It is the best place for the N64 cheats.  This is probably the best site for N64 cheats. 

Cheat Code Center-  At this site you can find cheats for Playstation, Playstaion 2, Nintendo 64, Sega Dreamcast, Gameboy, and you PC.  This is where I find my PC codes for my computer.  It is a great site for cheats.

Gamewinners-  This site provides you with cheat codes, game genie codes, and game shark codes for about every system.  A great site if you don't have a recent system like the Nintendo.  Another great site for cheat codes.

Video Game Strategies-  This site is the another site like gamewinners.  It provides cheats for every system.  It also provides game genie and game shark codes for every system.  I would recommend this site for people who need walkthroughs.  It is afflicted with gamewinners too.

Gamesages-  This is also a site similar to gamewinners and video game strategies.  It even provides a list of walkthroughs or faqs for each game.  I use this site for all my system.

Cheat Planet- You can find Nintendo 64, PC, Playstation, Dreamcast, and Gameboy cheats.  I use this for most of my PC games.  They have cheats, walkthroughs, hints, gameshark codes, strategy, save games, reviews, and demos.  A great cheat site to visit.