MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
Tulip Work Instructions - Use Tulip work instructions apps to guide operators with easy-to-follow, paperless instructions so they stay productive, engaged, and accurate.
TiddlyWiki - a non-linear personal web notebook
VKS Lite - Go paperless with the VKS work instruction software. Create step-by-step instructions with pictures, videos, PDFs and more! Version control, mass updates...
Confluence - Confluence is content collaboration software that changes how modern teams work
REWO - REWO is a knowledge documentation and distribution solution, which drastically improves capturing, visualizing and communicating knowledge.