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.
Startup Stash - A curated directory of 400 resources & tools for startups
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.
The Influencer Marketing Stack - Free resources to launch a killer campaign
Infinity - Infinity is a fully flexible work management platform where you can organize all your work, your way.
Makerbook - A directory of the best free resources for creatives