Meet New Friends - A new tool by Facebook to help you meet new friends
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.
Convoke - Convoke is a game made to provoke conversation.
SavvyCal - A scheduling tool both the sender and the recipient will love.
FreeTime - Calendly for friends
Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.