Finally, thanks be to God I found the IDEAL note-taking app! After trying out & searching through the complete MacAppStore and here on Macupdate (and hours of googling), finally I found this little app that truly is the perfect simplicity, distraction-free, notes organizing app, and yet even through simple looking (but it looks quite modern on OS X Lion, not at all like in the "old" picture here), and yet as simple as it looks it is indeed a powerhouse with uniquely useful features such as:

– automatic Backup (in Archive format, which is just perfect for Dropbox, Cloud Uploading etc.),
– Database Password Protection,
– Nested Tree Structure with Color Coding!,
– Rich Text Editing
– Color Text Highlighting,
– Instant Search
etc.

And that all for just small $14 !

Please do not be fooled by its initial simplicity, this app is a hidden gem! I used and bought Journler, Scrivener and Curio for my note taking but NONE made me work so efficient and clear-minded as this little app !!