The BCCD is a bootable CD image that boots up into a pre-configured distributed computing environment. It was built and motivated by the BBC project at LinuxCare, which has subsequently spawned off into the lnx-bbc project [of which, I'm an active contributer and package maintainer].
Freebookcentre.net's computer science section contains links to many technical books offered free online, either as html pages or downloadable pdfs. Books are arranged by subject: Data Structures and Algorithms, Compiler Design, Object Oriented Programming, Operating Systems, Computation Theory, Art more
Heterogeneous Adaptable Reconfigurable Networked SystemS
This subset of the Black Box Software Testing collection includes resources to teach Domain Testing: The Most Widely Used Test Technique. Resources include lecture videos, slides, activities, suggested readings, and study guide materials.