C:\> DIR /RETRO

Retro Workbench

Small, dependency-free recreations of classic computing tools that run in any browser. You can install them as apps, and they work offline.

BASIC-40 drawing a Mandelbrot set on a green CRT screen

BASIC-40

An 8-bit style BASIC interpreter with a 40×24 CRT screen and green, amber or white phosphor.

  • FOR, WHILE, GOSUB, DATA, string functions and arrays
  • Colour, PLOT/DRAW/CIRCLE graphics and SOUND
  • DEF FN, INKEY$, RENUM/AUTO, sharing by link
Open Source
The RPN-4 calculator with an LCD showing the four-level stack

RPN-4 Scientific

An HP-style Reverse Polish Notation calculator with stack lift that behaves like the real thing.

  • Four-level stack, LAST x, x↔y, roll
  • Trig, logs, powers, n!, STO/RCL 0–9
  • FIX/SCI/ENG, HEX/BIN logic, statistics
  • Keystroke programs and a paper tape
Open Source
The JSForth terminal printing a star pyramid, with the live data stack beside it

JSForth

A small, mostly standard Forth with compiled words, a return stack and a live view of the data stack.

  • IF/ELSE, DO/LOOP, BEGIN/WHILE, recursion
  • VARIABLE, VALUE, CREATE … DOES>
  • Floats, KEY/ACCEPT, MS, CASE, POSTPONE
Open Source
DigitalRerun: a CRT screen beside the front panel lights and the drive tabs

DigitalRerun

A CP/M 2.2 computer: a Z80 with 64K, the original CCP and BDOS, on an 80×24 VT100 or ADM-3A screen.

  • 8-inch floppy drives, a disk shelf, your own .dsk images
  • An FX-80 dot matrix printer, paper tape reader and punch
  • Snapshots, a debugger with breakpoints, works offline
Open Source

Medical Imaging

Clinical decision support for radiology, in Romanian. Installable, and it works offline.

IRIS home screen with a search box and the 14 guideline chapters

IRIS beta

A searchable guide to radiology imaging indications, in Romanian, built from the GIRI guideline.

  • 526 clinical situations, 1,246 recommendations
  • Search by symptom, exam or word fragment, with synonyms
  • Browse by chapter, save favourites, works offline
Open Source