Here's one for the noobs (from a noob). This demonstrates the use of shared memory. It's a program that spawns 10 children, and each one gets a special "babytalk" word to say.

HPHP Initial Comment
HipHop what you need to know

HPHP appears to be a significant product: a PHP compiler that compiles down to native binaries, saving time and CPU. It produces a monolithic, multithreaded binary.

A nice side effect could be that sites using HPHP would be a harder to hack. For one, you could never upload and execute a PHP script, because PHP is not running on the server.

HipHop leverages a simple fact of PHP-life: most of your code doesn't change. Even in a project with ongoing bugfixes, only a small number of changes are deployed. So, once the app's done and ready to be run full-time, it should really become a compiled application. HipHop is the compiler.

Rlib is a report writing engine that takes report specifications in an XML language. It emits reports in several formats including HTML and PDF.

Visit RLIB

I stumbled across RLIB while figuring out how to implement some MS Access report writing features in PHP. MSA users will know what writing a report is, but PHP coders probably don't, so I'll explain.