I've looked through some of the SOPW already and a few suggestions have been offered. Mainly ImageMagick and GD. Unfortunately, neither are prepackaged with Perl and most web hosts don't have either of these installed (and won't if you ask).
Is there any clean light-weight image resizer that doesn't depend on either of the two modules listed above? All I need to do is size images DOWN if they are too big. I don't have to increase their size, add any effects to the image, etc. Just a simple resize.
2006-04-13 Retitled by planetscape, as per Monastery guidelines
Original title: 'yet another image resizing question'