Dudle - Dudle is an online scheduling application, which is free and open source.
MINDBODY - Find and book fitness and beauty classes near you.
FullCalendar - FullCalendar is an open-source JavaScript event calendar.
Zen Planner - Zen Planner's fitness membership management software helps you grow your box, gym or studio with scheduling, automated billing & more. Try it now for free!
Framadate - Make your polls
Pike13 - Pike13 provides a mobile-first solution for "on-the-go" owners of small service business who are trapped in a paper world trying to manage their clients.