I'm an Engineer by profession but sometimes my job calls for some code hacking.
Recently I tried my hands using PHP, a very easy scripting language to build a resource and article directory for the San Diego API Health Network project. The site was built using joomla, an open source CMS (Content Management System). The Directory and Resources though was a result of integrating 68kb, a knowledge based system based on CodeIgniter.
It's amazing that you can build web applications with these freely available tools. That's the power of open source.