http://mydoodlesongs.com/ (Online-Guitar)

Review:

 It is inspired by google's doodle which was launched to celebrate Les Paul, the original guitar hero's 96th birthday on June, 9th,

http://www.google.com/logos/2011/lespaul.ht 

In the Google's version users have to hover the mouse over the doodle's strings and pluck their way or trigger notes with the letters and numbers on the keyboard. Press the "record" button, a 30 second's melody will be preserved and uploaded to a website accessible to people across the world.

But in MydoodleSongs, the creators had added  a gallery where the melodies are showed in numbers and letters. People can share the melodies in this manner, and also search out the songs they want and play them by just typing on keyboard.

Pros:

1. No music skills are required, anyone who can type can also play.

2. Its searching engine can be used to find the most wanted songs. 

3. The new melodies can be uploaded onto the website, and users can  share and vote on them.

Cons:

1. The song is not complete, only a short part is provided.

2.The periods of musical notes are unclear, which make it difficult to recognize a song for the new users.

3. The database of melodies is quite small, thus many songs can not be found.

4. The songs are not presented in accordance with the rating results.