FullCalendar - FullCalendar is an open-source JavaScript event calendar.
ClientBase - Travel Agency
Dudle - Dudle is an online scheduling application, which is free and open source.
Travefy - The easiest online and mobile group travel planner!
Smart Scheduling - Free scheduling software for spas, hair & beauty salons. Best online booking & calendar app. 100% FREE salon software. Try it Now!
iSell - Dynamic packaging booking engine for the travel industry