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
GanttProject is a free, open-source tool ideal for small projects and teams, offering essential project management features without the complexity, while OmniPlan provides a comprehensive suite of advanced project management tools, including collaboration and reporting features, making it suitable for larger teams and more complex projects.