Clinked - White-label Client and Team Workspace
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
SuiteDash - Integrated & Automated Client Portal Software : Secure Web Based Client or Customer Login Portals : White Label SaaS Project Management System, Online CRM Tool, Browser Based Invoicing & Recurring Billing, Time Tracker, Client File Upload, , All in …
TiddlyWiki - a non-linear personal web notebook
Slack - A messaging app for teams who see through the Earth!
Confluence - Confluence is content collaboration software that changes how modern teams work