Document360 - Self-service knowledge base software focused on SaaS Products & Enterprise Software Projects.
DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
ProProfs Knowledge Base - ProProfs Knowledge Base is a cutting-edge knowledge management software that assists businesses to reduces support tickets by self-help and create online manuals, guides, wikis, documentation, FAQs and more.
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
Onna - Onna centralizes organizations' most common information platforms like Confluence, Slack, Gmail, Drive, and Dropbox.
TiddlyWiki - a non-linear personal web notebook