SpiralBound for Mac

From Rivulus Software:

SpiralBound is intended for those Mac users who find that they store way too much information in Stickies, but aren't interested in using a database. SpiralBound is modeled after a spiral bound notepad with a few modern additions. Features include: The convenience of Stickies plus organizing and security features. The ability to remove pages from the notepad and display them as separate windows and return them to the notepad. Pages can be reordered using an intuitive visual approach. An inline calculator can be accessed at any time by just typing a mathematical expression. Pages can be searched by title or content; past searches are remembered. Pages can be password protected at the user's option. The pages can be secured from prying eyes when in the background or after a period of inactivity. Data can be imported from Stickies.