Research

A Stack of Ice and Fire is a TCP/IP tutorial for A Game of Thrones fans.
aug3d is a small augmented reality demonstration.
Chicken Scheme Caveats explains minor bugs to new Scheme programmers.
Factor Caveats helps newbies acclimate to the Factor programming language.
GetOptFu makes command line parsing easy.
Git+Unity helps video game developers use Git to manage their projects.
Haskell for the Evil Genius is a declarative programming tutorial for malcontents.
Hello LLVM guides the user through installing LLVM and writing his first assembly program.
Installing Common Lisp helps budding Lispers get started.
Installing GNU Smalltalk helps Smalltalk newbies.
Little Tut. is a quick introduction to LaTeX.
Parallel Processing with Haskell is a quick introduction to parallel computing.
sensei teaches Japanese by computer.
Wolfram The Reckoning is a mathematic role-playing game.

Bertrand Russel's conjecture, a proof that 1+1=2.
Collatz Space is a programmable poster.
Ehrlich is a shell script for debugging Erlang modules.
Flipped files created with Flip.
Forkbombs open forkbombs, which open forkbombs.
Pig is a fun dice game and experiment in probability.
QuickCheck ports for several languages are maintained by YelloSoft.
Rosetta Code: Multiline shebang catalogs Emacs' :;exec emacs -batch -l $0 -f main $* in dozens of programming languages.
Rosetta Code: Program name catalogs Perl's $0 in dozens of programming languages.
Rosetta Code: Scripted main catalogs Python's if __name__=="__main__": main() behavior in dozens of programming languages.
Shpider is a WWW::Mechanize equivalent for Haskell.