Nifty - Manage projects, work, and communications in one place.
Whereby (formerly appear.in) - Collaborate from anywhere - video meetings with no downloads
Calendly - Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.
Around.co - Around.co is an app that provides video calls to remote teams all around the world.
FreeBusy - Easiest way to share availability across calendars for free
Remote Meeting - Remote Meeting with Video, Voice, Chat and Screen Sharing