Evernote is a note-taking application. It works both on the desktop (Mac and PC) and the web and syncs between the different versions so that you have access anywhere (including smart phones).

It has nice features both for creating and finding notes. Notes can be created through the application, via an email message (to the appropriate address on their website), by clipping a screenshot, or even by taking a picture with a webcam. Notes can be tagged which also helps in finding them. Of course, there is keyword search but their value added feature is recognizing words in pictures and making that part of the search. So, for example, if you take a picture of your receipt from “Joe’s Pizza” then that note will show up on a search for “pizza”.

Overall, it’s a very nicely done application.