Kanboard - Kanboard is a free and open source Kanban project management software.
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.
Excalidraw - Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.
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.
Kinopio - Thinking canvas for mind mapping, brainstorming, and moodboards
Basecamp - A simple and elegant project management system.