Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
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.
PHP Event Calendar - PHP event calendar script with multiple views and many customizing options.
The Receptionist - The Receptionost is a visitor managemnt solution that has visitor logging system to track visitor traffic.
Appoint.ly - Appoint.ly helps to schedule meetings quickly and easily through the integration with calendars online.
Qminder - Qminder works the way it sounds: It helps a company mind its queues.