BookStack a platform to create documentation/wiki content built with PHP & Laravel.

DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.

Lessons Learned Server is a light-weight knowledge-base web application that allows storing textual information, documents and media hierarchically.

Nuclino is a cloud-based team collaboration software which allows teams to collaborate and share information in real-time.

TiddlyWiki is an open-source single page application wiki in the form of a single HTML file that includes CSS, JavaScript, and the content.

Fandom is an entertainment site where fans come first.

Confluence is a team collaboration software. Written in Java and mainly used in corporate environments.

Google Sites is a structured wiki- and Web page-creation tool offered by Google as part of the G Suite productivity suite.

Microsoft SharePoint is a browser-based collaboration and document management platform.

Pmwiki is a wiki-based content management system (CMS).

Tomboy is a desktop note-taking application for Linux, Unix, Windows, and Mac OS X.

wikidPad different from other notepad applications is the ease with which you can cross-link your information.