DejaGnu - DejaGnu is a framework for testing other programs.
Dial - Quick & beautiful macOS timer.
Expect - Expect is a tool for automating interactive applications such as telnet, ftp, passwd, fsck, rlogin...
wnr - Better than pomodoro, this timer app balances work and rest.
Check - Check is a unit testing framework for C, which runs on environments such as GNU/Linux, GNU/Hurd, BSD, and Mac OSX.
Hourglass - Hourglass is the most advanced simple countdown timer for Windows.