A number of universities provide free online access to audio, video and print materials. These sites do not necessarily offer credits or CE, but if you just want to learn, try them!
OER Commons -- Open Educational Resources
iTunes U -- inside the Apple iTunes Store, to download to your iPod
These universities are developing free scholarly materials and software tools. In some cases you can make arrangements to receive course credit (may require payment):
Connexions from Rice University
OpenCourseWare from MIT
Open Learning Initiative from Carnegie Mellon