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.
MySignature - MySignature is FREE Email Signature Generator that helps to create Professional Signatures for major email clients such as Outlook, Gmail...
Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.
Sigstr - Email signature marketing
Reservio - Reservio is a simple online booking and appointment scheduling application.
WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.