Mine was Ghostfox. I had enjoyed using ghostzilla and found it pretty nifty for browsing on my school computers, so when they folded and the browser started get

Mine was Ghostfox. I had enjoyed using ghostzilla and found it pretty nifty for browsing on my school computers, so when they folded and the browser started getting increasingly outdated, I hacked together an extension for Firefox using VB6 (gasp!) that mimiced the hiding and being shown as part of another app bit. I believe that the ideal first project would be something you require for yourself, and probably something that you know might be a tad challenging too.