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.
DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
ONLYOFFICE - ONLYOFFICE is a complete office and productivity suite.
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
WPS Office - Would you need Office Word, Excel or PowerPoint for Home, business or School? WPS.com would give you right version for you.
TiddlyWiki - a non-linear personal web notebook