Letsfind - Letsfind is a fast, easy-to-use, ad-free way to create online (meeting) polls.
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
FullCalendar - FullCalendar is an open-source JavaScript event calendar.
Standuply - Run daily standup meetings and track your metrics in Slack
FreeBu - Smart free/busy calendar sharing and meeting organizer.
MeetNotes - Increase Productivity with Meeting Notes Tool. More effective minutes, Prepare Agenda, Collaborative Notes & Action Items.