TiddlyWiki
Open Source
TiddlyWiki is an open-source single page application wiki in the form of a single HTML file that includes CSS, JavaScript, and the content.
Nuclino
Freemium
Nuclino is a cloud-based team collaboration software which allows teams to collaborate and share information in real-time.
BookStack
Open Source
BookStack a platform to create documentation/wiki content built with PHP & Laravel.
Confluence
Commercial
Confluence is a team collaboration software. Written in Java and mainly used in corporate environments.
Microsoft SharePoint
Commercial
Microsoft SharePoint is a browser-based collaboration and document management platform.
Lessons Learned Server
Freemium
Lessons Learned Server is a light-weight knowledge-base web application that allows storing textual information, documents and media hierarchically.
Compare XWiki with alternatives
Compare Microsoft SharePoint and XWiki and decide which is most suitable for you.
Compare Lessons Learned Server and XWiki and decide which is most suitable for you.