Boostnote - Boostnote is an open-source note-taking app.
DokuWiki - DokuWiki is a simple to use and highly versatile Open Source wiki software that doesn't require a database.
SSuite Sticky To Do - SSuite's Sticky To Do app gives you an easy way to track your tasks and organize your day.
Wiki.js - An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.
Taskwarrior - Taskwarrior is an ambitious project bringing sophisticated capabilities to a simple and elegant...
TiddlyWiki - a non-linear personal web notebook