The Zenkit suite may do what you want. I started using it when M$ applied E3 to Wunderlist
I went to take a look and it doesn't seem to be open source
How are you finding Anytype?
I tried moving to it recently but eventually gave up because of how complicated it got. Vikunja was on my list of things to try. I still haven't found something I like.
Appflowy was next on my list to try. It seems to have matured a lot since I last checked
We found Anytype when searching for a Notion alternative and it is indeed a good one. It is still missing a few features, mainly related to dates and calendars but I am having fun setting up the templates. It takes a bit but eventually it does click, in my case my spouse did the hardwork and explained to me how to use it, lol.
The two main ways I am currently using it are: creating a page and putting a bunch of relevant stuff in there and the other is creating a type and creating a set of said type to be displayed. Don't know if that will make sense to you but if you are interested I can try to type it in a more detailed way. Logseq is nice but sometimes I needed tables and it was a bit of a mess. Anytype doesn't have this issue.
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