human.io : A system for coordinating the activities of users via their mobile phones.
Flask : Flask is a microframework for Python based on Werkzeug, Jinja 2 and good intentions. And before you ask: It's BSD licensed!
Plone : Plone is a free and open source content management system built on top of the Zope application server.
Harpoon : CLI tool for open source and threat intelligence. Harpoon is a tool to automate threat intelligence and open source intelligence tasks. It is written ...
Faktory : Faktory is a language-agnostic, persistent background job system.
sh (previously pbs) is a full-fledged subprocess interface for Python that allows you to call any program as if it were a function