Hi,
Please check "Add-Ins and Integrations" manual. It describes about all Add-ins.
Add-Ins and Integrations - CA PPM - 15.4.1 - CA Technologies Documentation
And you can check Add-ins which is installed in your environment.
Go to ADMINISTRATION->Studio->Content Add-Ins.
You will see all add-ins in your environment like as below.
--- The csk and the clarityContent are installed in my environment.
When you click "Accelerator: program management Office" link, you will see below screen.
Select "Items" tab and you will find all items (Query, portlet,...) which are installed by csk.
Regards,
Shoichi