WowAce

Repairs your items automatically upon visiting a vendor.

On login, displays changes to your guild since the last time you logged in.

FuBar_DuraTek

Automatically sends guild recruitment ads to the GuildRecruitment channel.

Mail plugin for any DataBroker display.

Displays a table for possible outcomes of incoming hits with their probability

End of combat reporting for feedback on how your cast time was spent or wasted.

Mutes Annoying Sounds

Joins the LFG channel automatically.

LDB addon to manage your addons

Reputation Statistics - Gained, Needed, Rep/Hr, Session Time, etc.

Shows the number of battle resurrections you have and when the next one will become available during a boss encounter.

Check for unenchanted and ungemmed items

Keeps track of your reagents.

LibAvion-2.0

All Flight Masters, flight duration and more.

ControlFreak

RollCall-1.0

Add SyLevel item level display support to Bagnon.

Makes it very easy to collect rare battle pets.