Call to Idea - A gallery of inspiration for product designers
Slack - A messaging app for teams who see through the Earth!
AuthorBee - Organize Twitter around your interests
Smoothboard Air - Smoothboard Air is a collaborative interactive whiteboard application for iPads and Android devices that revolutionizes interaction in lecture rooms.
Voynetch - Share your visual notes and graphic recordings.
Groupboard - Free collaborative online whiteboard, web conferencing and online tutoring software that can be embedded in your own website. Used by many online tutors, schools and universities.