Jasper
Jasper - A flexible and powerful issue reader for GitHub
...In addition to unread issues, unread issue comments and review comments are highlighted in a clear and easy-to-understand manner. Unread comments are also displayed on a mini-map to help you keep track of the entire issue. Quickly see the issue's open/close, label, milestones and assignments. It also shows the review status of the pull request (approved, request changed, commented) along with the reviewer. You can search for locally stored issues with a subset of the GitHub Search query. In addition to searching for issues, this can also be used for navigation within Jasper.