Coworker Coffee - Coffee with a different coworker each week
BuyerBot Slack Bot - Amazon purchasing for Slack teams
Serendipity - Serendipity is a PHP-powered weblog engine which gives the user an easy way to maintain a blog.
Slackbot Workout - A slackbot to get your team in shape
Twine - Twine is an open-source tool for telling interactive, nonlinear stories.
JEFIT - Jefit is the #1 popular gym workout app for Android and iOS. Jefit allows you to manage your training routine and keep track of your workout progress easily.