The title says it all. Lets you set up a stable URL (like http://gitreports.com/issue/schneidmaster/gitreports.com) for anonymous users to submit bug reports for your website/app/product, which are then created as an Issue on the appropriate GitHub repository. Supports public and private repositories, personal and organization repositories, and Issue labels. Also lets you activate/deactivate each individual repository for reporting (always deactivated by default) and provides a few custom message settings to show to users reporting bugs.

Open-sourced under MIT license at https://github.com/schneidmaster/gitreports.com