Nifty - Manage projects, work, and communications in one place.
Mergefly - A modern UI for GitHub pull requests
ZenHub - ZenHub is how the world's best software teams work together. Trusted by NASA, Docker, and Rackspace. Start free today!
GitHub Reader - A quick way to browse GitHub issues and pull requests.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Contractbook - Helping businesses scale with future-proof contracts