A far more reliable and straightforward YouTube experience than what the official Windows Phone 7 plug-in delivers, SuperTube streams high-definition videos over Wi-Fi and 3G and lets you download them to your phone for offline viewing. It's a much better way to get your cat-video fix.
WIRED Search clips by relevance, view count, date published, and rating. Lets you resume broken downloads.
TIRED Can't set it to open external YouTube links.