Google Calendar - Spend less time managing your day & more time enjoying it
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
Zoho Calendar - Zoho Calendar is a business calendar that comes along with the Zoho Mail suite of applications. Make your schedules click by effortlessly managing events with Zoho Calendar.
PHP Event Calendar - PHP event calendar script with multiple views and many customizing options.
Morgen.so - All-in-one Calendar, Tasks & Scheduler. Morgen is the single hub for everything that revolves around time management.
The Receptionist - The Receptionost is a visitor managemnt solution that has visitor logging system to track visitor traffic.