Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Hive - Seamless project management and collaboration for your team.
pretix - pretix helps you to sell tickets for your event in an easy way. It supports multi-lingual events and provides a wide range of features
Sup! Standup Bot - The complete stand-up and follow-up bot
Ticket19 - Sell tickets for your events with minimal transaction fees.
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.