I also used Gollum for a while and it's great. You can just directly create and edit text files and do a commit, or use the web UI or whatever you feel like. A

I also used Gollum for a while and it's great. You can just directly create and edit text files and do a commit, or use the web UI or whatever you feel like. And it's one of very few systems that support org-mode files in addition to Markdown, although keep in mind the way Gollum links files is not quite compatible with org-mode's standard syntax. Nowadays I just use those org files directly though, as it's just for my personal use.