Atlassian Design Guidelines
Getting Started with Active Objects
Active Object Tutorial
Using Active Objects in Atlassian Plugins Video
Writing an Atlassian Gadget
Writing Gadgets (Packt Pub)
Managing Plugin Dependencies
Atlassian Maven Repositories
Google Guava
Cloud Foundry Sample Apps
Stackato Sample Apps
AppFog Sample Apps
Cloud Foundry Source
Cloud Foundry Blog
Manifests
Cloud Foundry API Documentation
Cloud Foundry Developers - Google Group
Stackato Client Reference
Stackato Blog
AppFog Blog
Tier 3