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.

Scalr - Scalr is cloud management software for public & private infrastructure

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

Mist - Mist is a Multi-Cloud Management Platform - Streamline operations + Optimize costs across public & private clouds, hypervisors & containers.

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.

Stackmasters Managed Cloud - Stackmasters provides cloud management and application hosting solutions for private, public and hybrid clouds.