TakeNote - A web-based note-taking app with GitHub sync and Markdown support.
Modern CSV - A CSV editor/viewer
NoteAway - NoteAway is the simplest, most convenient way to take quick notes on OS X.
Rons CSV Editor - Rons CSV Editor / Now Rons Data Edit
LibriVox Audio Books Supporter - LibriVox Audio Books Supporter app comes up with an extensive collection of audiobooks through which you can search for your favorite book and listen to it in your native language right at your fingertips.
ReCsvEditor - Csv / Tsv / Delimited file editor. Supports for very large Files.