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.
SocialPilot - SocialPilot is an app designed to help businesses and professionals with social media marketing.
Microsoft Planner - Microsoft Planner lets you easily bring together teams, tasks, documents, and conversations for better results.
Fomo - Fomo turns your site into the online equivalent of a busy store
CAMPR - Open source project management tool with 16 modules
Buzzstream - Build Relationships. Build Buzz. Web-based software that helps the world’s best marketers promote their products, services and content.