Tools
Small things I use
A working set of datasets, apps, and references. Each one emerged from actual use — not speculation. Every tool here obeys the portability discipline. The data lives in the repo; the viewer is just a renderer.
app
3DP Estimator
Per-job quote calculator for FDM print shops. Material x markup, machine + labor + setup, buffer + rush. Per-line cost allocation, print/CSV/copy export. Runs in your browser.
app
Area moments of inertia
Interactive calculators plus reference formulas for area moments of inertia of common cross sections. Rectangles, circles, I-sections, more. Inputs to beam deflection math.
app
Beam calculator
Shear, moment, and deflection diagrams for 1D beams. Point loads, moment loads, trapezoidal distributed loads. Pin, roller, and fixed supports. Determinate and indeterminate via one solver.
app
Boat crane sizer
Parametric sizer for a simple derrick-style boat crane. Mast + boom + diagonal strut. Picks aluminum pipe sections, computes reactions, internal forces, and stress utilization. Built for getting rafts on and off boat roofs.
dataset
Consumer FDM printers
Build volumes and specs for the ten most-purchased FDM printers. Read from a single JSON. Consumed by the rhino build-volume templates.
app
Tables
Multiplication-table drill with spaced repetition and mental-math tricks. Installable PWA. Runs in your browser. No backend, no signup, no tracking.