"Semi-curated" list of resources, tools and fun websites:
A simple guide to testing in django based on the example app from the django website.
Some basic electronic tutorials on Filters, Transistors, Basic Formulas, Motors...
A very simple yet enjoyable maze written in Java. Its addicting.
A fun little blackjack game.
Library of arcade (coin-operated) video games from the 1970s through to the 1990s.
The collection includes action, strategy, adventure and other unique genres of game and entertainment software.
The Ohio State Open Source Club is a student organization at the Ohio State University that meets weekly to discuss open source related topics.
One of the most complete LaTeX references on the internet.
A small handy reference for symbols in latex.
This site will let you make latex equations by clicking buttons. Especially helpful if you can't figure out how to get an equation to look properly. Also, it has a lot of nice examples.
Tutorials and tricks having to do with windows scripting, from batch to VB Scripts, as well as some nifty free programs.
A side-by-side reference sheet for Common Lisp, Scheme, Clojure, Emacs Lisp.
Has solutions to the same task in as many languages as possible.
fail2ban log file and ways to analyze it using simple command-line tools such as awk and grep.