Microsoft visualizes developer enthusiasm for WP7 with a wall filled with app icons, at their annual MIX conference.
ZuneHD has got potential for 3rd party apps if only Microsoft opened it up for them and sold the device in more countries.
Download videos from youtube or watch them on the destop, download music songs from last.fm, create last.fm album art wallpapers & track your software usage with these apps.
No need to send invites to friends to view quiz results on facebook, this trick helps you to see the result after the quiz.