The Los Angeles Public Library offers free, online tutorials in a number of subjects, starting with foreign languages.
Learn Spanish (or French or Italian or dozens of other languages, or English if your native language is another) with interactive software that includes apps for Android and I-Phone. (I've used the
Mango Language courses, but the library also offers
Powerspeak.)
Universal Class is organized into over 40 major topics, including (among many others) accounting, business, computers, finance, history, homeschooling, math, real estate, psychology, and
special education. Within each of those topic areas, there are anywhere from 10 to 40 or more online courses (more than 500 total courses). Registration is required, as some of these courses may be used to meet continuing education requirements. However, these are self-paced tutorials.
A little less intense,
Learn4Life rotates a series of 6-week, online courses from about a dozen topic areas, including a number of courses in computer software applications, a beginning guitar course (what?),