WS Charts is a PHP class that can be used to render charts of several types. It takes a list of values that define points of one or more sets and renders charts of several possible types: line, bar, surface, and pie. The class provides options to choose colors, gradients, show coordinates, etc. The generated charts can be saved to a given file or displayed as the current script output.
Twibright Registrator removes noise and can quadruple the resolution of a camera in software by matching several pictures together. It can be applied to remove noise, JPEG artifacts, rain, CRT stripes, and passersby. It can enhance night photos and provide the effect of long exposure in daylight. Pictures are matched by removing shift, rotation, zoom, and brightness changes. It features high performance bilinear interpolation, automatic adaptive corrective deconvolution, 32-bit float depth, photometrically linear space, and 16-bit depth PNG output.
DatePNG is a PHP class can be used to generate a PNG image with a given time. It opens a template image in PNG format and renders text with a time in one or more formats. The font, size, position, angle, and color of the text are configurable parameters. The resulting image is generated in the PNG format as the current script output.
pngquant is a batch conversion utility to quantize and dither truecolor PNG images, especially those with a full alpha channel, down to "RGBA-palette" PNGs (i.e., PLTE + tRNS in PNG parlance). Such images are usually two to four times smaller than the full 32-bit versions, and partial transparency is preserved quite nicely. This makes pngquant especially useful both for Web sites and for PlayStation 2 development, where one of the texture formats is RGBA-palette-based (though not PNG-compressed).