| gschem | Circuit schematic design |
 | Printed circuit board design |
 | EDA tools |
 | Gerber RS274-X file format viewer |
| gnuplot | Oscilloscope output visualization |
 | Raster graphics design |
 | C compiler for couple of utilities written in C |
 | | sodipodi |
| Vector graphics design |
 | Raster image data processing |
 | | GNU make |
| Keeping I2C2P project source tree up2date |
 | Distributed revision control for the I2C2P web |
 | I2C2P & Twibright Labs web scripting |
 | I2C2P & 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 web content and image galleries |
 | Vectorization of raster graphics |
 | | Perl |
| PCB processing scripts |
 | | Linux |
| Operating system kernel |
 | Operating system |
