TextPad - TextPad is a powerful, general purpose editor for plain text files that is easy to use, with all the features a power user requires.
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
TiddlyWiki - a non-linear personal web notebook
Falcon - Ultraportable 2-in-1 Laptop
Confluence - Confluence is content collaboration software that changes how modern teams work
Boostnote - Boostnote is an open-source note-taking app.