Looking for a team collaboration project management solution, basically:

• scrum project management with kanban (something like jira but probably simpler will do)
• communication connected to project management (something like slack)
• file repository (like a nextcloud drive)
• calendar with caldav.

Data sovereignty and libre software is a must.

At first we thought nextcloud would do all this, and it does but the kanban app (deck) is kinda limiting (only 3 hierarchy levels and no swimlanes)

So we can connect nextcloud with openproject but as openproject has some features only in enterprise plan, was wondering for other solutions... Could be one integrated solution or maybe better following UNIX philosophy and having separate small pieces of software that do their work fine and can connect via API/Webhooks? Like a good kanban (wekan, vikunja?) Connected to a matrix server (continuwity?) And maybe also connected to nextcloud or other online collaborative drive?

Any ideas welcome!

Thanks!!

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