Watchr_scripts is a project mainly written in Ruby, it's free.
My .watchr scripts for use with the watchr gem
This is my personal collection of watchr scripts. I hope you like them :-)
Will only run one script at a time. Use this if you want to test a file in isolation before running the whole suite. Very useful if you have a long-running test suite.
Acts similar to autotest. Will run the tests for a single file until all the tests in that file are passing, and then run the whole suite.