Things I made
printu.plPhoto books, calendars, posters and canvas prints from your own photos, designed in an online editor. Polish market.
annotely.comAnnotate any screenshot in the browser: arrows, shapes, highlights and blur, with no install or sign-up.
scribblepadgames.comClassic pen-and-paper games as printed notepads or print-at-home PDFs. No screens, no ads.
Writing
- Read the ticketA drill for decoding option positions from broker notation
- SFFE, a fast math expression evaluatorHow a parse-once, evaluate-forever C interpreter is built
- Mortgage loan calculationDeriving the fixed monthly payment formula, also available in Polish
- Quadratic Bezier curve lengthA closed-form derivation of the arc length integral
- Curb your egoNotes from a side project that did not work out