- www.millerhelp.com - Beginning Algebra - Intermediate Algebra
- ocw.mit.edu - MIT OpenCourseware on many different subjects
- mathway.com - Web-based problem solver
- khanacademy.org - Free Youtube tutoring videos on many different subjects
- easybib.com - great to carry out APA style citations
I have to recommend coursera.com where you can take several courses with the option to earn a certificate for a fee. An alternative is udemy.com. There are many other promising open course content being made available by independent course offerings and universities.