P.S. Notes is made to work alongside the various plain-text, Dropbox syncing mobile notes apps such as Denote for Android and Jottings for iPhone from an app for the Ubuntu desktop. Plain text notes anywhere you want. Easily synced between your desktop and phone. Notes, plain and simple.
Try it out by doing:
sudo add-apt-repository ppa:thejambi/thejambi
sudo apt-get update && sudo apt-get install psnotes
Like it? Please say thanks.