JGrit is a program that converts images from common formats (e.g. GIF, JPEG, BMP, and PNG) to source code that can be used to render the image on either the Game Boy Advance (GBA) or the Nintendo DS (NDS) system. There are already programs that do this, but none that play nicely with both Windows and Linux. It uses the grit command line tool as a backend.
Image Resizing Class is a PHP class that can be used to resize images while preserving their aspect ratio. It can open a JPEG, PNG, or GIF image and resize it in such way that neither the width nor the height exceed given size limits. The image is resized to preserve the original proportion between the width and height. The resized image is generated in the JPEG format, overwriting the original image file.