Coworker Coffee - Coffee with a different coworker each week
Slackbot Workout - A slackbot to get your team in shape
Serendipity - Serendipity is a PHP-powered weblog engine which gives the user an easy way to maintain a blog.
EnkiBot - The AI skills mentor of the future
Twine - Twine is an open-source tool for telling interactive, nonlinear stories.
YouCanBook.me - YouCanBook.me is a cloud-based service which allows your customers to schedule appointments and make bookings.