Listr - Listr lets you explore some of the best lists on Twitter, curated across your favorite categories.
ClippingMagic.com - Remove image backgrounds online. Make backgrounds transparent, white, etc. Edit, crop, rotate, fix colors, add shadows, all you need for great photos!
Refined Twitter - A browser extension that improves the Twitter experience
Bg Eraser - Background Eraser on Mac and Windows.
Blindfold - Make your life on Twitter more positive
Hyper Headshots - Hyper Headshots is a cloud-based web app that allows you to convert photos into beautiful and professional headshots with ease.