'Universal Class' has real instructors and contact with students who are interested in the same things you are. Classes cover a variety of subjects from academic to professional to general interest. Learn about microbiology, dog training, photography or a host of other subjects. Go at your own pace and take as many a five classes at a time. Access is 24/7 and some courses offer Continuing Education Units. Get started here.
AtoZdatabases gives you access to nine unique databases with a single search.
is PC, MAC, iPhone, iPad, Kindle Fire and Android compatible. The "Getting Started" Guide is available here.