Sitecore - Sitecore A/S has produced the Sitecore content management system since 1999.
DejaGnu - DejaGnu is a framework for testing other programs.
Pendo - Pendo helps product teams understand and guide users to create product experiences that customers love.
Expect - Expect is a tool for automating interactive applications such as telnet, ftp, passwd, fsck, rlogin...
Gotcha - User-centric analytics & triggers, driven by micro-surveys
Check - Check is a unit testing framework for C, which runs on environments such as GNU/Linux, GNU/Hurd, BSD, and Mac OSX.