One small but notable early open-source contribution of mine was the nice HTML formatted test results output for the RSpec Textmate bundle added in the 0.7.4 release back in 2008. I guess not many people use TextMate these days but for years it was *the* Mac editor. You can see it here: https://thejqr.com/2009/02/06/textmate-rspec-and-dot-spec-party.html