OnBase - OnBase is an enterprise content management and process management software suite.
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.
IBM FileNet - Enterprise Content Management platform for large businesses
Notion - All-in-one workspace. One tool for your whole team. Write, plan, and get organized.
Structr - Open-source data CMS platform.
Slack - A messaging app for teams who see through the Earth!