Lauren Ipsum
Carlos Bueno
Write Yourself a Scheme in 48 Hours
Wikibooks contributors
A State Of Grace : Daily Meditations
The Augustine Fellowship
Angels' Blood
Nalini Singh
Mathematics for Computer Science
Eric Lehman & F. Thomson Leighton & Albert R. Meyer
Open Data Structures (in C++)
Pat Morin
Open Data Structures (in Java)
Open Data Structures (in pseudocode)