Tomboy is a desktop note-taking application for Linux, Unix, Windows, and Mac OS X. Developed by Alex Graveley
License: Open Source
Tomboy is ideal for users looking for a simple, lightweight note-taking app with Markdown support, while KeepNote is better for those who need rich text formatting and hierarchical organization. However, KeepNote can become cluttered with its extensive features, whereas Tomboy remains straightforward.