Dudle - Dudle is an online scheduling application, which is free and open source.
Letsfind - Letsfind is a fast, easy-to-use, ad-free way to create online (meeting) polls.
FullCalendar - FullCalendar is an open-source JavaScript event calendar.
Appointlet - Appointlet is an appointment scheduler built on top of Google Calendar.
Framadate - Make your polls
Acuity - Looking for accounting for your SaaS company? We can help.