Artemis by Arkan Emberwalker
A tool for hunting down those annoying STDOUT piped bugs, and the twits who cause them.
Dungeon Crawler by FatherToast
Ever wanted to be that one guy that survives by using paper clips? Well fret no more! This mod may not include paper clips, but it does include just about everything you need to survive in a world without the comfort of having a home.
EnchantView by Thebombzen
This mod allows you to see the enchantments you'll receive from the enchantment table before you enchant your item. Note that the server needs the mod for you to see the enchantments in multiplayer.
This mod provides an in-game interface for the mod list hosted over at modlist.mcf.li.
Inventory Tweaks by Jimeo Wan, Kobata
Tweaks to inventory handling for ease of use, including sorting and automatic replacement of broken tools or exhausted stacks of items.
MineTweaker by Stan Hebben
Modpack and server tool enabling the addition and removal of recipes
Motion Capture by EchebKeso
The Mocap mod is a mod aimed at film-makers who wish to record the motion of their character and replay it back via a scripted entity. It allows you to create a whole series of composite characters for use in your own videos without having to splash out on extra accounts or enlist help.