OpenGrok - OpenGrok is a fast and usable source code search and cross reference engine.
GitHub Polls - Polls for GitHub issues and readme
GitZip - Download or create a download link for a GitHub project folder/sub-folder or file.
Octotree - Github on steroids
DownGit - Directly download or create download links to GitHub public folders or files.
Metaverse - Democratized augmented reality platform: AR for everyone!