코세라
https://www.coursera.org/
버블링
https://www.verbling.com/ko
멤라이즈
https://www.memrise.com/ko/
잉글리쉬 센트럴
https://ko.englishcentral.com/browse/videos
케이크
https://www.cakecorp.com/
링글
https://soft-provide-417236.framer.app/home
산타
https://kr.aitutorsanta.com/
ELSA
https://elsaspeak.com/en/
칫챗
https://www.chitchat.study/
스픽
https://www.usespeak.com/ko
To pick up a draggable item, press the space bar.
While dragging, use the arrow keys to move the item.
Press space again to drop the item in its new position, or press escape to cancel.