Nuclino - Nuclino works like a collective brain, helping teams bring all their knowledge, docs, and projects together in one place. It's a modern, simple, and blazingly fast way to collaborate.

xournal - Lightweight notetaking and sketching app.

OneNote Online - OneNote Online, part of Office Online, is the online version of Microsoft OneNote.

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...

OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.

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