Resilio Sync Business - Resilio Sync Business is a solution to collaborate on shared assets.
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
Just Social - JUST SOCIAL provides all the collaboration tools like enterprise social network, real-time document collaboration
TiddlyWiki - a non-linear personal web notebook
Slite - Your company knowledge
Confluence - Confluence is content collaboration software that changes how modern teams work