Freelancer Resources List - The biggest collection of free resources for freelancers
Nifty - Manage projects, work, and communications in one place.
Startup Stash - A curated directory of 400 resources & tools for startups
UnderPinned - One app to manage your projects from start to finish.
Bonsai - One platform to streamline your entire business
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.