Logstalgia

Here's a weird one that recently hit the Gentoo repositories:

Logstalgia

Basically, it replays the access log for your Web server - video game style! Using opengl, it transforms your Web log into a colorful version of Pong: each time you get a hit, the paddle for that virtual host (if in vhost paddle mode) intercepts the ball, also displaying the return code and the page accessed. Maintains a counter for the hits. Fun to watch, and also handy because you can adjust the speed (to quickly go over a lot of data) or sync with standard input from tail (to watch server activity in real time).

Here's a snazzy video:

http://youtu.be/HeWfkPeDQbY