Apache OpenOffice - Apache OpenOffice is an open source, office document productivity suite.
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
LibreOffice - Free office suite, open source, and compatible with .doc, .docx, .xls, .xlsx, .ppt, .pptx files. Updated regularly – download for free. Originally based on OpenOffice.org.
TiddlyWiki - a non-linear personal web notebook
Microsoft 365 - Boost your productivity with reliable access anywhere with services like email, calendar, file sharing, meetings, instant messaging, and Office Online
Confluence - Confluence is content collaboration software that changes how modern teams work