MURAL is a digital workspace for whiteboarding and collaboration. The platform enables innovative teams to think and work visually to solve important problems.mural.co
Basecamp is a project management and internal communication tool for remote teams. The platform puts everything in one place: message boards, to-dos, group chat, file storage, and more.
Miro is a collaborative online whiteboard platform designed for remote and distributed teams.
monday.com powers teams to run processes, workflows, and projects in one digital workspace, with a code-free environment. Check out their post on Collaboration Software, which goes into the in's and out's of collaborating as a team.