If you are looking for one tool that will manage all your work from project management, task management, document management and meeting management then look no further! Easynote is a super friendly tool, having multiple tools built in one single tool! For more information visit: easynote.com
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.
HeySpace - HeySpace is the only free task and simple project management software with communication and collaboration feature.
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.
Rivers IM - Simple, fast & secure team collaboration platform
Harvestr - All in one product management platform.
Slack - A messaging app for teams who see through the Earth!