@h Taiga appears to be the FLOSS alternative of choice replacing Trello Disroot offer it along with a great selection of tools. They do amazing work. Their plan, this coming year, is to make their tech stack very easy for others to replicate / collaborate. https://disroot.org/en/services/project-board @Matt_Noyes
Taiga? I had a quick play, but I've not used.
I've been involved around the edges of projects using kanban type tools to organise their work.
I have used other stuff at Disroot. Nice project & nice people.
A Fediverse instance for people interested in cooperative and collective projects.