DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
FileInvite - Stop chasing your clients for documents! Easily request files, documents, forms & signatures from your clients – set a due date and save hours as your requests are returned to you effortlessly.
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
iDeals Virtual Data Room - iDeals Virtual Data Room is a tool that provides secure access to large amount of confidential documents and can view, analyze and collaborate in a protected environment.
TiddlyWiki - a non-linear personal web notebook
Clinked - White-label Client and Team Workspace