Windows: If you have lots of movies ripped or downloaded to your hard drive it can be difficult to keep track of the details. Movie Explorer scans your hard drive and pulls movieup posters and details from iMDB. You can use Movie explorer to browse your movies, then launch your selection directly from the program for viewing in your default player.
Once Movie Explorer scans your collection, you can search itby title, year, director and genre. The app is in the beta stage right now; the only quirk I've seen is that a couple of my movies were misidentified at first, but it was fairly easy to correct that problem.
If you have a lot of movies on your computer and sometimes can't keep track of them all, give the free beta of Movie Explorer a whirl.