Don't know the name of the song? Just hum a few bars into this search engine.

Are you looking for a song but only know some of the notes to it and the title simply escapes you?  Then Midomi might just be for you.  Just sing, hum, or whistle into your microphone and let Midomi find your music for you.  It's not perfect, but it is a new revolutionary way to find that lost tune you don't know the title of.  It requires that scripts are turned on in your browser, so be careful.

Download link:  http://www.midomi.com/

It is usually possible to find the full lyrics of a song simply by typing a fragment into Google.
If that doesn't work, try googling "song lyrics" to discover whole sites devoted to this topic.

Please note:

Previous visitors to this page will recall that the comments section underneath had become a venue for requesting details about unidentified songs. As these were nothing to do with the original article it was decided to switch the comments facility off. On the understanding that this was a popular discussion topic though, a dedicted thread entitled “Name This Song!” has now been created for this purpose in the forum here: