Songr is a free desktop app that can
find downloadable MP3s from multiple sources on the
internet. In addition, it allows for a “lyrics
search” option that can identify and download songs
based on parts of lyrics that a you might remember.
It also can download YouTube videos or alternately
only the audio part of a YouTube video as MP3.
Windows XP, Windows Vista, Windows 7. Requires
.NET Framework 3.5.
(no longer exist)