Xournal++ is a hand note taking software written in C++ with the target of flexibility, functionality and speed.
Super Productivity
Put a task into your project for today or schedule it to another day to keep your head free.
Notorious
Keyboard centric notes.
Lifeograph
Lifeograph is an off-line and private journal and note taking application for Linux desktops and Android.
It offers a rich feature set presented in a clean and simple user interface.
Notejot
Stupidly simple notes app
SimpleNote
The simplest way to keep notes
Notae
The notes plugin provides you a quick way to paste text, to write down a list of things, to leave a note to your friend, or whatever you had do with Post-It’s.
Open ToDo List
A simple Todo and task management application
Zettlr
A Markdown Editor for the 21st Century
Knowte
Cross platform note taking application