Boostnote is an Open Source note-taking app designed for programmers and web developers.
There are quick access links found on the lower right that includes zoom, every type of document you could imagine, size, indent, and last update. Resizing Boostnote smaller does slightly mess up the formatting of these quick links. The menu section allows you to decide where your storage is, define hotkeys, and tweak the user interface.
Boostnote lets you take your notes in Markdown with live previewer, use snippet notes, multiple hotkeys, finder popup (similar to the spotlight of OSX), and latex support. But keep in mind Boostnote is not to be confused with a post-it style applications or a Notepad replacement since it is geared toward programmers/web developers as mentioned above.