Evernote for Windows just received a significant update that brings it into parity with the Mac version. The new version 5 now supports reminders, shortcuts, related notes and improved search. Not to mention the entire app is much nicer to look at.
I like Evernote a lot and it's a wonderful collaboration tool. It's nice to have all the convenience and rich design I'm accustomed to on the Mac sitting in front of me on my Windows machine too.