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.
Tribe of Mentors - Short life advice from the best in the world, by Tim Ferriss
Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.
Awesome Peers - Discover 900+ people who have free video call options
SavvyCal - A scheduling tool both the sender and the recipient will love.
MentSpot - Find a mentor or become one for free