Workfront - Award winning project management software helps you manage projects in one place. A cloud-based work management tool for marketing and IT teams.

Scrumpy - A simple, beautiful and agile project management software

Planisware - Planisware PPM software supports NPD and R+D processes to help organizations make confident business decisions.

Planning Poker for GitHub - Story point estimation in GitHub with ZenHub

NQI Orchestra - A project portfolio management solution. NQI Orchestra helps manage the life cycle of the project portfolios.

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.