Meetings.io doesn't require users to register at all which could make it a great alternative to Google+ Hangouts.
Meetings.io allows you to have up to five people in a room. You can start using Meetings.io by simply clicking on the blue "Get a Meeting Room" button. When you click that button Meetings.io will create your room and assign it a URL to share with the people you want to video conference with. Once the room is created just allow Meetings.io to access your webcam and you're in business. You can make your room public or private after it has been created.
If you do want to register on Meetings.io, you can. Registering on Meetings.io allows you to create a personalized room with a URL chosen by you. That room is yours to use as many times as you like.
Applications for Education
Meetings.io doesn't have screen sharing or file sharing, yet but it still could be a good way to host a small video conference with students, parents, and colleagues. I think that Meetings.io could be useful for hosting parent-teacher conferences with parents who cannot come into your school.