I see many people here on the forums talk about packages, and what to change and stuff, but maybe it is easier to place all packages in a first post of one topic. I'll do my best to find the time to manage all the packages you would like to share with the world in this post.
For all of you who want to develop their own packages, Till posted a nice description here
let's kick off with the basics:
UebiMiau Webmail [Download]
PHPMyAdmin-2.6.4-pl3 [Download] [Update instructions]
PHPPGAdmin 3.5.2 [Download] [Installation instructions]