Apple's OS X Mountain Lion introduced Notes.app — a simple and convenient note-taking application.
Notes Export is a small utility for exporting notes stored in Notes.app to a single CSV file. It exports all of your notes at once, quickly and effortlessly, to a file of your choice.
From their the notes can easily be imported into other database application such as Numbers.
This app is compatible with OS X Mavericks.
Github project source code (just an applescript) available here.
The original Notes Export (notes as individual HTML files) can be downloaded in a convenient, ready to use app bundle from this link: https://github.com/pmatiello/notes-export/releases.
The source code for the original application is also available at the GitHub page.
Notes Export is free software, available under the GNU General Public License version 3 (GPLv3). For more information, please check the Copying.txt file.