xournal - Lightweight notetaking and sketching app.

Getodo - colorful lightweight multi-level to-do list on Android, iOS, web.

Xournal++ - Xournal++ is a handwriting notetaking software with PDF annotation support. Written in C++ with GTK3, supporting Linux (e.g. Ubuntu, Debian, Arch, SUSE), macOS and Windows 10. Supports pen input fr...

Keeeb - Keeeb unleashes knowledge that the corporate enterprise didn't know it had. We connect existing information islands while optimizing the discovery process with a novel workflow, and automate knowledge discovery through artificial intelligence.

NoteLab - NoteLab brings the power of digital note taking to Linux, Windows, Mac OS X, and Solaris.

Team-One - Team-One is more than messaging; it’s teamwork made simple.