Xournal++
Take handwritten notes

Xournal++ is a hand note-taking software written in C++ with the target
of flexibility, functionality and speed. Stroke recognizer and other parts are
based on Xournal Code, which you can find at sourceforge. It supports GNU/Linux
(e.g. Ubuntu, Debian, Arch, SUSE), macOS and Windows. Supports pen input from
devices such as Wacom Tablets.