Wallcat - Enjoy a new, beautiful wallpaper, every day.
New Tab by Flickr - Get a beautiful photo each time you open a new tab
Splashify - Beautiful desktop wallpapers for Mac and Windows
New Tab Startup Quotes - Inspiring startup related quotes in every new Chrome tab.
Irvue - (previously Unsplash Wallpaper) Gorgeous wallpapers on your Mac.
Less Boring New Tab - Your browser deserves a better new tab page