Standart Mods
Modloader
Everything updated for 1.5.1. Read this entire post. All of it. Downloading the mods means you agree to the disclaimer. You can skip the FAQ, but if you have an issue, consult it first, before consulting us.
SinglePlayerCommands
Single Player Commands (SPC) Version 4.7 for Minecraft 1.5.1 If you're looking for a server, or need to contact me, currently the best place is through this PvP survival server: pvp.darkmines.net . Download Automated Installation [ Preferred ] - [ Alternate ] Click here for a video tutorial on how to use the installerTooManyItems
Marglyph's TooManyItems Create and enchant items in-game, including mod items. Save and load entire inventories. Create unlimited stacks and tools. Switch game modes, test mods, create huge survival worlds, and more. Updated quickly!