PUBLIC MARKS with tags notes & macosx

Sidenote tries to catch the “Stickies” spirit but in the form of a multi-document drawer that will hide in the corner of your screen (left or right). You can use it to take all your daily notes, include images and easily modify text color and font. Sidenote will automatically expand so that you will be able to drag into it any picture, text clipping or pdf file from the finder or your favorite application. Sporting notes auto-saving, you’ll never have to save your notes. Sidenote will handle that for you. You can also print them or export them to rtf.

Deep Notes is a simple hierarchical note pad. You can use it to outline ideas, make "to do" lists, or whatever else might need jotting down in a list, structured or not.

Notational Velocity is an application that stores and retrieves notes