HPGL-Distiller filters out aspects of an HPGL file which are not relevant for various HPGL output devices, typically vinyl cutters. Irrelevant codes are filtered out to prevent many vinyl cutters from responding poorly to the excess data. With the use of HPGL-Distiller, you can use Inkscape, QCAD, GIMP, and many others to produce appropriate vinyl cutting output results.
Instant Picture Creator is a wrapper to produce images on demand for Web sites. It has filter management, and it's possible to add new filters. It can cache filtered images, works independently (no backend is needed), and is easy to integrate with existing Web sites. It includes two basic filters for resizing images and manipulating colour palettes. Currently it supports PNG, GIF, and JPEG.
psbind examines the margins in a PostScript document and rearranges the pages to fit them onto paper efficiently. It outputs a transformed PostScript document. Because psbind detects the margins in its input automatically, it is particularly useful on documents with large or unbalanced margins.
netpbm-free is Debian's fork of netpbm that was designed with security of code, reliability of interfaces, and freedom of software in mind. It is a suite of over 200 different programs from different authors, and is itself a fork of pbmplus. The suite supports almost every graphic format (including JPEG, PNG, BMP, ICO), and can create, change, crop, rotate, and transform in and between these formats.
GAIA Image Transcoder (GIT) is a library that operates image transcoding, with a special focus on mobile applications. It comes in two parts: a transformation and transcoding library that performs image adaptation to mobile device using information retrieved from WURFL files, and a very simple JSP tag library that enables library utilization in a J2EE environment. The transcoding library works as a transformation pipeline. The pipeline is composed of a set of filters. A filter can operate directly on the image body, or indirectly on the associated meta-information. The GIT architecture supports the management cycle of such pipes, while GIT tag libraries simplifies their definition.