CozyCal - Online appointment scheduling
Kyber for Slack - All-in-one Slack app: tasks, standups, polls, surveys & more
Sorted - Sorted³ has been crafted to make scheduling quick and easy. Try it for a few days and it may very well become a productive, yet enjoyable part of your day.
Huminos - Free OKR and Growth acceleration platform for Startups
RobinPowered - Robin coordinates meeting spaces, people, and things in your office. Complete with analytics and insights that uncover usage and help optimize space.
Meetingbird - Powerful meeting scheduling and notes — right in your calendar