RCov

RCov is a code coverage tool for Ruby, commonly used for viewing overall test coverage of target code.

In 2009 I contributed to the 0.9.0 version of RCov. My changes included revamping the HTML output of the coverage report to improve readability, adding row highlighting, creating coverage % and source directory filters, implementing sortable columns for better usability, and adding support for custom per-project CSS files. For more information, see the official RCov repository at Github and my blog post about the RCov 0.9.0 UI enhancements.