VivifyScrum is a project management tool which started off as a Scrum and Kanban collaboration tool. Over the years, it has grown into a full-fledged PM tool with a number of advanced features available, such as team management with worklogs, an in-built time tracker and invoicing options and more. It features integrations with GitHub, GitLab, BitBucket, Slack and it allows for webhook integrations with other apps. VivifyScrum has a very generous free plan, as well as reasonably-priced Premium Plan. Educational and non-profit organizations should inquire about a discount. Enterprise, self-hosted version is also available.