From Novel Games:
In this game you play the note that appears on the staff. At first the notes will be simple notes that spans only one ocatve with no sharps and flats, as the game progresses more difficult notes will be presented and the frequency of appearance of the notes will also increase. You can test your fluency with musical notes in this game.
What's new in this version:
This version is the first release on CNET Download.com
Drills you on note reading for both the Treble ("G") Clef and the Bass ("F") Cleff - in other words, for both hands for piano/keyboard players. Starting level is extremely easy and grows in intensity slowly. The game style is certainly better than flash cards! I'm guessing this would be a nice tool for kids, and hey, it's free.
Gets boring quickly. There's software out there that is better suited to improving note reading skills, mainly because there is not just one way to learn. At least one of the free software packages I downloaded from this site, Music Reading Deluxe (Listed on Download.com as "Note Reading Extended"), offers a variety of ways of identifying notes and lets you choose between clefs (Treble or Bass).
Okay for drilling - it's almost like flash cards set to a game. It can get boring quickly, but may be more fun and challenging for children.