Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
New Tab by Flickr - Get a beautiful photo each time you open a new tab
Planyway - Visual project management for Jira and Trello: manage resources, build project roadmaps, use time tracking.
Exposure New Tab - Get a beautiful photo from Exposure in every new tab
Corrello - Dashboards for agile teams using Trello
Less Boring New Tab - Your browser deserves a better new tab page