Jitac is a Java application that converts images into ASCII art by associating blocks of the image with ASCII characters. It supports several image formats (GIF, JPEG, TIFF, and PNG) and some image manipulations that can be performed before the conversion (inversion, grayscale, resize, and gamma correction).
GL2PS is a C library providing high quality vector output for any OpenGL application. It uses sorting algorithms capable of handling intersecting and stretched polygons, as well as non manifold objects. It provides advanced smooth shading and text rendering, culling of invisible primitives, mixed vector/bitmap output, and much more. It can currently create PostScript (PS), Encapsulated PostScript (EPS), Portable Document Format (PDF), and Scalable Vector Graphics (SVG) files, as well as LaTeX files for the text fragments.
UniConvertor is a universal vector graphics translator. It uses the sK1 engine to convert one format to another. There are import filters for CorelDraw (CDR and CMX), Adobe Illustrator (AI), Scalable Vector Graphics (SVG), and some other formats, and export filters for AI, SVG, WMF, and sK1's own format.
Picasa is Google's photo organizer. It makes it easy to find, edit, and share digital photos. It automatically locates and remembers all pictures and sorts them into visual albums organized by date with recognizable folder names. You can drag and drop to arrange albums and make labels to create new groups. This Linux version mostly has the same features as the Windows version, and is based on a modified version of Wine.
DeuTex is a wad composer for Doom, Heretic, Hexen and Strife. It can be used to extract the lumps of a wad and save them as individual files. Conversely, it can also build a wad from separate files. When extracting a lump to a file, it does not just copy the raw data, it converts it to an appropriate format (such as PPM for graphics, .au for samples, etc.). When it reads files for inclusion in pwads, it does the necessary reciprocal conversions. In addition, DeuTex has functions such as merging wads, etc.
batchgimp is a batch processor for rendering of images. It uses a command-line interface, and supports JPEG, GIF, PNG, and PSD file formats. It accesses the GNU Image Manipulation Program (GIMP) plug-in structure to provide image processing functions. Images are processed in a batch for an entire directory. batchgimp is written in Perl and interfaces with the Scheme scripting engine provided by the GIMP.