Audiosurf:

http://www.audio-surf.com/

The Wikipedia entry for Audiosurf is incredibly good, with lots of information about it:

http://en.wikipedia.org/wiki/Audiosurf

OpenDNS

http://www.opendns.com/

Your computer reads DNS as an IP address while you read DNS as www.something.com.  Using OpenDNS (which is completely free) lets you block anything from your kids or co-workers, protects you from phishing, customize the logo’s that appear, create shortcuts so you don’t have to type www.gmail.com and instead can type mail, and tons more.  It’s a great free tool for anyone who needs a cheap way to get around normal DNS protocol, and customize something of your very own.

Hak5 BBS

Hak5 has a bulliten board system via telnet.  To get to this in Windows (In Vista make sure to enable the command prompt), go to the Start menu.  Go to Run… and type in cmd.  This takes you to the command prompt window.  Type in telnet bbs.hak5.org (TELNET (spacebar) bbs.hak5.org) and press enter.

This will pull up some nifty Hak5 ascii art and ask you to create a Username and Password.  From there, once you log in, you can read messages, join a chat room, and best of all – play Legend Of the Red Dragon (LORD).  To get to LORD, skip reading your messages, and once you get to the big list of options (usually colored in blue font) choose X for external programs.  Then choose 2 for games, and 6 for LORD.

Synergy co-op Mode gives us an amazingly fun mod called Synergy.  You can use this mod for Half-Life 2, ep. 1, and ep. 2. To install it, you basically have to have the Half-Life games, with the SDK Source installed.  You then run the synergy installation and it’s all set!  Synergy mod even shows up as an independent game in X-fire.  It’s pretty cool

There’s a few kinks I found while playing the game with 2 other people.  There are a few places where the game skips (just a few puzzles, the end of a level, etc..). Another thing is the Half-Life games were obviously made for one player mode, and when you have multiplayer- it gets a little easy.

But it’s frackin TOTALLY RAD to run into a level with a team and take it out in minutes~!! omg!  Play it!!  It’s really fun to go through the Half-Life games on multiplayer!!!