WowAce

Displays the time until the next battle and more.

FuBar_ChatLockFu

Quickly see what counter-combinations your epic followers cover and which ones are likely to get a new combination when rerol...

Cartographer_Trainers

Collects, analyzes and presents information about the virtual economy.

A tool to appraise, estimate, or judge your equipment against the equipment of others.

Display front-end for LibGuildPositions-1.0 using HandyNotes

Display an informational fighter jet style HUD while flying or riding

Heads Up Display with Player and Target Info

Save and load macros.

Stores a browsable database of spells that mobs cast

StarVisuals displays various data visualizations

Replacement for default Rune Frame and more.

Allows you to create icons, which can be customized greatly by user's input. CiR is more than just the usual cooldown tracker.

Helper functions used by my addons, feel free to use them in your addon too

CCBreaker

NRT_EPGP

Nvp

Gives a score for your kit allowing easy comparison with others, also colour codes kit based on appropriateness for your level.

ClosetGnome_Mount