If you've already got notes stored elsewhere, Justnotes can import plain-text files and Evernote notes. It can also export your notes as plain-text files, although the app crashed every time I tried to use the export option.

I do have a few quibbles with the app. For one, I'm not a fan of the way Justnotes names new notes created in (or moved to) a synced folder: Rather than use the first line, or first few words, of the note as the file name, Justnotes gives these files names like . For those of us who want to open our notes in a Dropbox-enabled iOS app, this naming convention makes it impossible to figure out which note is which. I'd also like to see a Duplicate command for making a copy of a note, and I'd like to be able to delete a note immediately, rather than go through the intermediate Archive step. And though Justnotes does offer full-screen mode, the width of the window is set--on my 27-inch iMac, I couldn't make the window wider than roughly one third of the width of the screen. Finally, a pie-in-the-sky wish is for support for basic note formatting.

Nevertheless, Justnotes's interface is simple but effective, mirroring the elegant look of the Simplenote iOS app and website--if you're already using Simplenote, Justnotes is a no-brainer purchase. But it's also a very nice OS X notes app, and its sync options will make it especially appealing to those with iOS devices and multiple Macs.

(Justnotes is currently $6, but the price will increase to $10 after an unspecified introductory period. Justnotes works with any version of Lion, but the developer notes that syncing to a local folder requires OS X 10.7.3.)