As a hobbyist programmer, I’ve written several small utilities and screensavers:

Mac OS X Utilites/Applications:

• Bubbles X – A Mac OS port of the Windows Vista bubbles screensaver.
• NeonClock – Another Mac OS X screensaver featuring a glowing neon clock!.
• MacStars – A just-for-fun Mac OS X screensaver – this time with sparking stars!.
• Icon2PNG – extracts and converts Mac icons of all formats to PNG images.

Web 2.0 Apps:

• iConvert – online utility to convert various icons to png, ico, and icns from many formats.

Linux / Open Source:

• libicns – A library for reading and writing Mac OS icons.
• icns2png – Command line utility for extracting PNGs from icns files.