Free, and staying free
Everything we know about judging software you did not write
86 guides, definitions, calculators and checklists in one place. No account for any of it. This is the research side of the site; the catalogue is where you buy.
- Guides
- 16
- Definitions
- 60
- Calculators
- 3
- Free downloads
- 7
Guides 16
Long-form walkthroughs with a diagram, a simulator where the arithmetic matters, and the mistake people actually make.
OpenGlossary 60
Every term that made you nod along, defined plainly, each one naming the specific way it gets misread.
OpenCalculators 3
The numbers that surprise people, worked out properly. Free to use, free to embed on your own site.
OpenFree downloads 7
Checklists you can print, cheat sheets that translate the jargon, and short guides to send to a colleague.
OpenThen go and look at something real
Every listing in the catalogue carries the checks these pages describe, with the findings published and the limits stated. Free to browse, no account needed.
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