What are the 3rd party software products we can integrate with ALM/QC?

IBM ReqPro
BM Rational Team Concert
IBM Rational Req. Composer
IBM DOORS
Atlassian JIRA
Atlassian GreenHopper
Selenium
Rally
Serena
Version One
BugZilla
TeamForge
IRIS
Microsoft TFS
ARIS
BluePrint
Caliber Requirements Manager
Remedy
Proprietary