| gschem | Circuit schematic design |
 | EDA tools |
 | Raster graphics design |
 | C compiler for couple of utilities written in C |
 | | sodipodi |
| Vector graphics design |
| ImageMagick | Raster image data processing |
 | | GNU make |
| Keeping Ronja project source tree up2date |
 | Distributed revision control for the HPS web |
 | Ronja & Twibright Labs web scripting |
 | Ronja & Twibright Labs web server |
 | Text editor |
 | Web browser (acquiring technical and scientific information from web) |
| gv | PDF and PostScript viewer (viewing datasheets) |
| MaPiVi | Gallery image annotation and postprocessing |
 | Synchronization of image galleries |
