Open source Todo and Note taking for MAC OS X

Boostnote

Boostnote is the note-taking app for programmers that focuses on markdown, snippets, and customizability. Edit your code and wikis from anywhere. (GPL)

Linux - Windows - MAC OS X

Jarnal

Jarnal is an open-source application for notetaking, sketching. (GPL)

Cross-platform

Joplin

Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor. (MIT)

Linux - Windows - MAC OS X

QOwnNotes

QOwnNotes is the open source plain-text file markdown note taking application for GNU/Linux, macOS and Windows, that (optionally) works together with the notes application like Nextcloud or ownCloud. (GPL)

Linux - Windows - MAC OS X

Sleek

Sleek is an open-source todo app that makes use of the todo.txt format. Sleeks GUI is modern and clean yet offers a decent set of functions which help users getting things done. Sleek is available as a client for Windows, MacOS and Linux. (GPL)

Linux - Windows - MAC OS X

Standard Notes

Standard Notes is a simple and private notes app available on most platforms, including Web, Mac, Windows, Linux, iOS, and Android. It focuses on simplicity, and encrypts data locally before it ever touches a cloud. This means no one can read your notes but you (not even us). (AGPL)

Linux - Windows - MAC OS X

Super Productivity

Organize your daily tasks in one place while making time tracking a lot less annoying. Super Productivity is a ToDo List / Time Tracker / Personal Jira Task Manager for Linux, MacOS and Windows aimed at reducing the time you spend with repetitive tasks and to provide you with a place to collect all the information you need to do your job. (MIT)

Linux - Windows - MAC OS X

Task Coach

Task Coach is a simple open source todo manager to manage personal tasks and todo lists. (GPL)

Linux - FreeBSD - Windows - MAC OS X

8 applications