I am looking for open source project planning software. The type of software I am looking for is like Microsoft Project. Another one that can do similar is OnlyOffice. Both are ok, but also have their limits. While Microsoft Project only exists for Windows but not Linux and only runs locally, OnlyOffice is a bit limited in functionality, not being able to properly handle human resources, working hours, hourly rates at different times, ...
Is there any open source project planning suite running in the browser? A bit like OnlyOffice?