"Semi-curated" list of resources, tools and fun websites:
Sections:
CLI tools
Screen User's Manual... self explanatory
Databases
self explanatory
Django
A simple guide to testing in django based on the example app from the django website.
Editors
JOE is a full featured terminal-based screen editor.
A hackable text editor
Electronics
Some basic electronic tutorials on Filters, Transistors, Basic Formulas, Motors...
Games
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.
Git reference
A handy git cheat sheet.
One of the sites I used for doing my research about git. Really well written documentation.
Groups
The Ohio State Open Source Club is a student organization at the Ohio State University that meets weekly to discuss open source related topics.
Hobbies
Website devoted to DIY aquarium-related projects. Lots of neat ideas and videos.
Raspberry Pi powered time lapse dolly
A project designed to make a time lapse dolly for a camera.
Woodworking videos, projects, and tips
Some wood working projects and videos
LaTeX
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.
Misc
This website brings you news and information about San Franicsco's historic streetcars and cable cars.
A bunch of odds for casino games
Photography
Free/Open Source Photography
GNU Image Manipulation Program
Nik Collection is multiple image editing plug-ins and tools.
Politics
The truth-o-meter will teach you that everyone lies.
The World's Smallest Political Quiz
Yup
Programming
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.
Sports
Football formations, defensive and offensive positions, etc.
This website allows you to view the national television network of every NFL, CFB, and MLB game throughout their seasons and playoffs.
System Admin
fail2ban log file and ways to analyze it using simple command-line tools such as awk and grep.
Web
Complete CSS cheat sheet. Updated with new CSS3 tags.
Tutorials in just about part of client-side web development. HTML, CSS, Javascript...
A really helpful and complete CSS cheat sheet.