Ever wanted to contribute to a recognized project on GitHub? Issuebase can help. It lists good first issues in many projects across many languages.
The site is completely free to use.
Contributors to issuebase are welcome. Feel free to open a pull request adding more repositories to the issuebase manifest. Please only add repositories that are "notable" (that is, with a certian amount of community interest). How to add a language/project.
If you're looking to make a larger change (i.e., beyond a bug fix/patch), please open an issue before submitting a pull request.