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.
Communifire - Enterprise Social Collaboration Software
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Bonzai Intranet - Bonzai is an intranet platform with flexible pre-built features for SharePoint and Office 365.
Slack - A messaging app for teams who see through the Earth!
hub - The Hub is a versatile intranet portal and collaboration solution that boosts employee engagement and productivity in a digital workplace.