Creativebug offers thousands of online arts and crafts classes.
LinkedIn Learning offers thousands of classes on technology (writing code, web and software development), business and marketing (Excel spreadsheets, anyone?), graphic design, photography, music lessons, audio production and more!
Pronunciator is a fun and free way to learn any of 98 languages with personalized courses, movies, music, and more, on your desktop computer or mobile device!
Kanopy has Great Courses and Princeton Review classes among its video offerings.