GanttProject is free Java based, project management software that runs on the Windows, Linux and Mac OS X systems. Developed by Dmitry Barashev, Alexandre Thomas
License: Open Source
SprintGround is a robust project management tool with strong collaboration and time tracking features, making it suitable for larger teams and complex projects. In contrast, GanttProject is a lightweight, open-source software that excels in customization and is ideal for simpler projects but lacks advanced features like time tracking.