RemoteTeam - Remoteteam.com helps remote teams become great places to work with the fully-integrated platform to automates payments and HR tasks.
OpenBoard - The OpenBoard software is an interactive white board software.
Swipes - Plan projects, take action and discuss.
Conceptboard - Instant Whiteboards for Teams & Projects
ApproveIt for Slack - Get approvals in minutes, not days. Right from Slack!
Scribblar - Scribblar is a free online collaboration tool that is perfect for online tutoring.