iTunes Artwork Finder
Works like a charm.
WALTR: Effortless iTunes Alternative for Windows & Mac
If at some point I have to abandon iTunes…
Drag-n-drop and Music, Ringtones, Videos, PDF & ePUB files into any Apple device without iTunes (& no extra apps).
Pierre Igot: Swinsian: Fantastic iTunes replacement for music collectors
A very long overview of Swinsian, including instructions for having it work alongside iTunes.
Daring Fireball: EMI to Offer DRM-Free Online Music
A turning point.