Kyber for Slack - All-in-one Slack app: tasks, standups, polls, surveys & more
Doodle - Make meetings happen. With Doodle, scheduling becomes quick and easy.
Huminos - Free OKR and Growth acceleration platform for Startups
Framadate - Make your polls
Meetingbird - Powerful meeting scheduling and notes — right in your calendar
Dudle - Dudle is an online scheduling application, which is free and open source.