Is there an open source system for scheduling time for multiple people?

Question

Task Management

I am looking for some software for scheduling tasks and distributing between employees, I need basic functionality: add employees, the ability to set tasks and deadlines, mark the start of completion of work, and a graphical display of information, such as a Gantt chart or something like that.
Of greater interest are applications that can be installed on the server, since all the data is always at hand, well, you don’t have to rely on a third party. Found from OpenSource - 2plan, todoyu if anyone used write how they are?
From web based: producteev, asana, bitrix24 which are free for <N users. Also interested in user experience.

Answer 1

redmine

Answer 2

Try www.onlyoffice.com ex teamlab

Answer 3

Open Atrium