Articles

• Escaping PHP
• Date Formats
• Postcode Validation
• Nifty Algorithms

Articles on other sites

General

• UMLGraph - a tool to create UML from text descriptions
• [Java] Catching Exceptions in GUI Code
• How Microsoft Lost the API War
• A nice tutorial on color spaces, mixing and palettes

Debian Development

• New Maintainers' Guide
• checkinstall - turn a tarball into a deb
• debian administration guide to checkinsall
• rolling your own debian packages Pt1
• rolling your own debian packages Pt2
• kpkg basica
• kernel compile howto
• kpkg tutorial - "Creating custom kernels with debian"