Based on your query, I would recommend Miro as an excellent tool for creating collaborative projects.

Miro is a collaborative whiteboard platform that supports real-time collaboration, allowing multiple users to work on the same board simultaneously. This feature is particularly useful for group projects, as students can brainstorm, discuss, and work together in real-time, regardless of their location.

The platform also offers a wide range of templates and widgets for creating various types of content, such as mind maps and flowcharts. These features can help students organize their thoughts and ideas, making the collaborative process more efficient and productive.

Moreover, Miro integrates with popular tools like Google Drive and Dropbox. This means you can easily incorporate existing materials into your lessons, making it a versatile tool for various types of collaborative projects.

Finally, Miro offers a free Educational plan for teachers and students with a .edu email account. This plan includes features like unlimited active boards and custom templates, providing you with all the necessary tools for creating engaging and interactive collaborative projects.