API Fortress
Hoppscotch
HttpMaster
Request inspector
CurlHub.io
Advanced REST Client (ARC)
MockServer
Assertible
DocuCommit.se
BookStack
GitBook
Confluence
Wiki.js
Outline Wiki
Archbee.io
Daux.io
DocuCommit is a self-hosted documentation platform that stores every page as plain Markdown in your own Git repository. There is no database: every edit is a real commit, so revision history, diffs, and restore come from Git itself, not from a vendor's revision table.
Non-developers get a WYSIWYG editor that writes clean Markdown (toggle to source anytime), a guided three-pane merge when two people edit the same page, and paragraph comments stored in a sidecar file so the Markdown stays clean. Developers get files they can grep, and AI agents can read the entire knowledge base with a git clone. No integration layer, no sync pipeline.
Includes full-text search, draw.io and Mermaid diagrams stored next to the Markdown, and one-click export to Markdown, HTML, and PDF. A desktop app for editing, plus a read-only server (Docker) that publishes the docs to the whole team. Leaving costs nothing: the repo is already yours, so there is nothing to migrate out of.
A startup from Sweden.
API Fortress
DocuCommit.seAPI Fortress is recommended for development teams looking for an end-to-end API testing platform, particularly those working in environments that require continuous integration and delivery. It's also well-suited for businesses of varying sizes that need reliable API monitoring and performance insights.
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Hoppscotch - Open source API development ecosystem
BookStack - An open source knowledge management application that's focused on ease of use.
HttpMaster - HttpMaster is a professional software tool for testing and debugging HTTP applications, primarily aimed at REST API applications and web services.
GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
Request inspector - Debug web hooks, http clients
Confluence - Confluence is content collaboration software that changes how modern teams work