[cweagans]

University of the People (https://www.uopeople.edu/) offers a tuition free CS degree program (both an AS and a BS). Many of the course materials are quite old (in some cases 5-10+ years), but this is really only a problem where specific technologies are concerned (for instance, there's a mobile applications class that covers Android 2.x). Many of the more general concepts will still apply.

Note that you do have to pay for exams, which are $100/class. This works out to be ~$4k for your entire CS degree.

[hackermailman]

This seems to be the cheapest accredited option, use University of the People to get any kind of undergrad, then can pay for a masters in CS somewhere else. (Too bad uopen doesn't have an applied math undergrad, then the material being dated wouldn't matter).

There is Athabasca U in Canada which offers a fully online, and accredited BSc in CompSci or Applied Mathematics, and the only requirements are 16+yrs old (no transcripts or even highschool grad needed) but the fees are $900CAD or so for 3 credit courses and you need to complete 120 credits so ~$35k for an undergrad ($27k USD). http://www.athabascau.ca/programs-courses/ whereas you could do Upeople, obtain an undergrad and pay for Johns Hopkins MSc for the same cost.

[canadiancreed]

There's also been reports that Athabasca U is having funding issues at present, for those looking at this option (which is the only option in Canada for online in this field that I've found.)

[dexterdog]

It's $200/class for the exams now.

[cweagans]

It's only $200/class for grad students. OP is looking for a bachelor's degree.