| Beyond Compare | Keep directories up to date and synchronize my home and office machines. Scooter Software. Tim Thousand. |
| Curvefit Expert | Fit curves to data. Great. I use it frequently. Daniel Hyams |
| EditPad | John Goyvaerts |
| gnuplot | The PDAS programs use gnuplot as default. |
| IrfanView | A great image viewer. |
| Mozilla | The home of Firefox and Thunderbird. |
| Opera | An alternative browser |
| Tracer | A utility that I use to digitize charts and figures from printed sources. Marcus Karolewski |
| TtM | Converts TeX (or LaTeX) to MathML. Ian Hutchinson |
| Xenu | How I check the validity of links on my web pages. Tilman Hausherr. |
Also check my list of downloaded files.