Q-Stats - Get free marketing insights for every question on Quora.
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.
Seoxan - check seo report for any website, alexa ranking, server information, meta tags, authority, page speed and more
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
HypeStat - HypeStat is free statistics and analytics service, where you can find information about every website.
Basecamp - A simple and elegant project management system.