Flox - Manage and share development environments with all the frameworks and libraries you need, then publish artifacts anywhere. Harness the power of Nix.
DejaGnu - DejaGnu is a framework for testing other programs.
whatdevsneed - This is whatdevsneed.
Expect - Expect is a tool for automating interactive applications such as telnet, ftp, passwd, fsck, rlogin...
SmallDevTools - Handy developer tools with a delightful interface
Check - Check is a unit testing framework for C, which runs on environments such as GNU/Linux, GNU/Hurd, BSD, and Mac OSX.