- Outstanding features - feature list
- Sling in a few words - theoretical
- Discover Sling in 15 minutes - practical
- Sling for a RESTafarian - when you know REST
- Why should I care with yet another webapp framework?
- Sling + REST (for the beginner, with lots of REST explainations)
- Evolution of web application frameworks
- How OSGi Changed My Life Article at ACM Queue, good introduction to OSGi, its concepts and its history