Outline : Team wiki, documentation, meeting notes, playbooks, onboarding, work logs, brainstorming, & more…
WikkaWiki : WikkaWiki is a flexible, standards-compliant and lightweight wiki engine written in PHP, which uses MySQL to store pages.
LibreNMS : A fully featured network monitoring system that provides a wealth of features and device support.
Arora : Arora is a lightweight cross-platform web browser. It's free (as in free speech and free beer). Arora runs on Linux, embedded Linux, FreeBSD, Mac OS X...
DemocracyOS : DemocracyOS is an online space for deliberation and voting on political proposals. The software aims to stimulate better arguments and come to better ...
DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.