Absence - Employee vacation tracking system
DejaGnu - DejaGnu is a framework for testing other programs.
Appogee Leave - PARIM Workforce Management Software
Expect - Expect is a tool for automating interactive applications such as telnet, ftp, passwd, fsck, rlogin...
CWS TimeOut - CWS TimeOut is an online leave tracking software or absence management solution that can also be installed on the server.
Check - Check is a unit testing framework for C, which runs on environments such as GNU/Linux, GNU/Hurd, BSD, and Mac OSX.