linux

SSH Quoting
Clone Debian Linux with dpkg
IPTables
xmodmap
GNU screen 1
GNU screen 2
rescue crippled linux with ld.so

languages

bit shifting in C and Java
C arrays
JMS
psql to mysql
Smalltalk to Ruby

scheme

Programming in Scheme
Scheme Shell

common lisp

From Scheme to Common Lisp
Special Forms
Quicklisp
Portable Tail Recursion Optimization
Common Lisp Family Tree
Weblocks Tutorial part one
Suppress Hunchentoot error details
CLISP/ffcall on OSX
Using VIM to edit Lisp code

general

Tabs versus spaces