It's an information manager of sorts but there are no categories. If you can afford the luxury of categorizing all the information which passes by each day then notebook probably isn't the right program for you. On the other hand if you like the idea of a Personal Valet for storing whatever sparks an interest, it might be just the thing. Once you have a body of information accumulated you can use search and scrolling to find what you're looking for. This might be as concrete as a URL or it might be a vague notion of something useful which you want to rekindle.
Notebook is distributed as shareware.
It is a fully functioning version with no expiration date, just a nag window after 30 days. The idea is you try the software out and if you like it then you'll buy it. If you decide to keep the program you can get the registration specifics through the help system. ZDNet gave version 1.2 a 4 star rating.