Dudle - Dudle is an online scheduling application, which is free and open source.
FullCalendar - FullCalendar is an open-source JavaScript event calendar.
Smart Scheduling - Free scheduling software for spas, hair & beauty salons. Best online booking & calendar app. 100% FREE salon software. Try it Now!
Checkfront - Checkfront is built for Tour & Activity Operators, Rental companies and Accommodation providers. Manage your inventories online, centralize reservations, process payments and get unified access to leading distribution channels.
Appointy - Appointy is an advanced web-based scheduling software tool.
3veta - Modern meeting experience for remote teams designed by a remote team