Hot Courses in the UK
This site is a search engine for courses from the UK, you can select your specifications (make sure to include "Online and Distance if you planning to be studying online). It includes only recognized institutions. It might save some time searching through multiple sites.
http://www.hotcourses.com/
Most may already be aware of this, but the English system and levels of education are different than the American system. You'll want to know what qualifications the course you're interested in is offering you.
I wasn't accustomed to the English system prior to looking at these courses. This article clearly explains the "US/international equivalency" for the English levels of qualification.
As a personal opinion, I wouldn't pay for any course that offers a diploma under level 3.
