1. Dudle is an online scheduling application, which is free and open source.

  2. Make your polls

  3. FullCalendar is an open-source JavaScript event calendar.

  4. Painless group scheduling done right.

  5. Wiggio is a completely free, online toolkit that makes it easy to work in groups.

  6. Meeting and appointment scheduling software that helps you save time, increase customer satisfaction and be more competitive.

  7. Plan the time to have your meeting or event by co-ordinating availability with all the particpants using this fuss-free online tool.

  8. Organize your schedule and share events with friends without hassle. With Google's free online calendar, it's easy to keep track of life's important events all in one place.

  9. Xoyondo makes it easy to find a date for your event that works for everybody. You can also create polls and conduct surveys. Xoyondo is free. No registration required.

  10. Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.

  11. x.ai is a personal assistant who schedules meetings for you.

  12. Smart Calendar Assistant for Gmail | Boomerang Calendar