asciitosvg VS HedgeDoc

Nice and simple. I feel the only lacking feature for a basic blog is having unlisted blog posts, which is very handy when you want to share it to proof-readers. This can be done on google doc/hedgedoc [0] for sure, but then when porting there are very often typos creeping in.

[0] https://hedgedoc.org/

Maybe Hedgedoc will fit these needs? You can use markdown to format. https://hedgedoc.org/

If self-hosting is an option for you I would recommend that you go with HedgeDoc. Completely open source, you get all the features you asked for including real time collaboration.

You can give HedgeDoc (https://hedgedoc.org/) a try as a replacement for Google Docs.

It is the one that works best for concurrent editing IMO (but it is markdown which can be a problem for some)

I use one singular HedgeDoc document for that purpose. It's not exactly the same intent as Google Keep, but it's an awesome project I use anyway and fills the role perfectly for me personally.

HedgeDoc is a web-based, self-hosted, collaborative markdown editor. This open-source option allows a team to easily share ideas on notes, graphs and presentations in real-time. troubleshootmertr finds it a good option "for knowledgebase."

HedgeDoc [0] allows you to collaborate in markdown, and also create slides.

[0] https://hedgedoc.org/ and https://demo.hedgedoc.org/slide-example?both

For writing Markdown documents I use Hedgedoc.