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MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
Daux.io - Daux.io is a documentation generator that uses a simple folder structure and Markdown files to...
TiddlyWiki - a non-linear personal web notebook
Wikitten - Wikitten is a small, fast, PHP wiki.
Confluence - Confluence is content collaboration software that changes how modern teams work