Notezilla is a sticky notes app for Windows.

Nimbus Note is a powerful notes app and organizer.

lumio is an online content organizing platform.

Omni Notes open-source note-taking application, designed to be lightweight and simple without giving up smart behavior.

Elephant is a notetaker with a classic interface.

Fetchnotes is a simple way to keep track of notes and to do's so you can stay in sync with the people that matter to you.

Alternote is a note-taking app for Mac OS X. Alternote is an alternative Evernote client for Mac with Markdown support.

GNotes is a note taking app help making your life organized and much more easier.

nvpy is a simplenote-syncing note-taking tool inspired by Notational Velocity (and a little bit by nvALT too) on OSX and ResophNotes on Windows.

utWiker is designed to store notes in a tree. Such programs are called "outliner", personal wiki, or tree-like editors.

SuperNotecard helps writers of fiction and nonfiction with its tools.