Jira may be extremely sluggish and require a large amount of memory on the client side.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Frog Git - Frog Git is the community-based lightweight code hosting solution that is written in the Go language.
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.
Kiln - Kiln is a complete source control management system based on Git and Mercurial.
Wrike - Wrike is a flexible, scalable, and easy-to-use collaborative work management software that helps high-performance teams organize and accomplish their work. Try it now.