Git from the bottom up

by John Wiegley

git

UX Design for Startups

by Marcin Treder

Think Python

by Allen Downey

Algorithms

by S. Dasgupta, C.H. Papadimitriou, and U.V. Vazirani

A Byte Of Vim

by Swaroop C H

vim

GTD For Hackers

by Lars Wirzenius

gtd

Linux Kernel in a Nutshell

by Greg Kroah-Hartman