1. 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.

    freemium $12.5 / Monthly (Per user - Business Class)

  2. OmniPlan is a platform to visualize, maintain and simplify your projects.

  3. Flexible project management web application

    open-source

  4. OpenProj is a free, open source project management solution.

  5. Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!

    freemium $69.0 / Monthly (6 users / 50 GB / CRM+)

  6. opensource task & productivity management tool for growing startups

  7. The most intuitive platform to manage projects and teamwork

    paid Free Trial $17.0 / Monthly (2 Users - Basic)

  8. The Gantt Chart is a modern and extremely easy-in-use project plan system.

  9. Calligra Plan (formerly KPlato) is a project management application.

  10. TaskJuggler is a modern and powerful, Free and Open Source Software project management tool.

  11. Redbooth, the online collaboration software for team and task management. Be productive with project management tools like business chat and file sharing.

  12. Free Project Management Software (powerful constraint solver, read/write XML, muti-platform)