For anyone looking to get just a little bit more out of the Stickies app that Apple includes on every Mac, Stick Em Up by Jim McGowan might just be the app for you. Since he also writes Do It, the powerful todo list manager that we're a fan of, McGowan seems to have an eye for improving other apps and tasks that some of us perform on a daily basis. Basically speaking, Stick Em Up is a replacement for Apple's Stickies that offers one significant enhancement: categories. Notes can be grouped into whatever categories you'd like, which are all navigable by the keyboard and can all be effortlessly displayed and hidden. This allows all sorts of useful workflows to include Stick Em Up instead of having to look to another heftier note storage app like Yojimbo, or keeping multiple apps open just to get through the day. Users can create a category of Web Clippings stickies in which you can toss temporary URLs and images, but then hide that category at the end of the day and save room for all the other sticky notes you need to work with for another task. It's a subtle but liberating feature for a simple tool that offers a surprising amount of flexibility.
As with Do It and all his other software, Jim McGowan offers Stick Em Up as donationware from his site.