Doit.im - Doit.
Hive - Seamless project management and collaboration for your team.
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.
Sup! Standup Bot - The complete stand-up and follow-up bot
TickTick - TickTickis a cross-platform to-do list app & task manager helps you to get all things done and make life well organized.
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.