You can find some documentation in the "Resources" tab of the web site :
- "STM32-Primer2 user manual" in Primer 2 page,
- "evolution from version 2.x to version 3.x" in CircleOS page.
You can see also the tutorial "Primer2 Tutorial (Cubic)" project, and the Doxygen documentation "http://www.stm32circle.com/circleos_doc/index.html".
Concerning the examples, most of the projects on the web site are posted by members "as is" and we do not check all of them.
The projects provided as examples are these marked as "ressource" type.