DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
ShareAccount - Share your account without giving out your password
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
Wing-project.org - WING - Wireless Mesh Network for Next-Generation Internet
TiddlyWiki - a non-linear personal web notebook
Callio by Netguru - Never miss a call from your client or prospect