Tomboy
Open Source
Tomboy is a desktop note-taking application for Linux, Unix, Windows, and Mac OS X.
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.
Lessons Learned Server
Freemium
Lessons Learned Server is a light-weight knowledge-base web application that allows storing textual information, documents and media hierarchically.
wikidPad
Open Source
wikidPad different from other notepad applications is the ease with which you can cross-link your information.
XWiki
Freemium
XWiki is a free wiki software platform written in Java with a design emphasis on extensibility.
Pmwiki
Open Source
Pmwiki is a wiki-based content management system (CMS).
Compare MediaWiki with alternatives
Compare TiddlyWiki and MediaWiki and decide which is most suitable for you.
Compare Lessons Learned Server and MediaWiki and decide which is most suitable for you.