List of free knowledge-base tool/service for developerππ½

Free forever Live Chat Ticketing Knowledge Base Chat Pages Team Chat

2 Seats (Admin)
For personal websites and anyone who wants a basic chat to communicate with visitors.
Livechat, Team Inbox, Mobile Apps, Notification

Gitbook
GitBook helps you publish beautiful docs and centralize your teams' knowledge. From technical teams to the whole company.
Tag: knowledge-base, note-taking, docs
Unlimited Public Spaces Unlimited Private Spaces Advanced Editing Capabilities Publish And Customise Your Docs Custom Domains

Logseq
Logseq is a joyful, open-source outliner that works on top of local plain-text Markdown and Org-mode files. Use it to write, organize and share your thoughts, keep your to-do list, and build your own digital garden.
Tag: knowledge-base