FlapIt - A physical counter for all your social accounts
Cal.com - Cal.com (formerly Calendso) is the open source Calendly alternative.
Aqua - Share your social card, not your business card
Cron - Cron Calendar.
Notopass - Share your accounts without giving username/password
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.