Small, sharp tools for engineering students and working engineers. Each runs in the browser; the code is public.
Interactive statics problem sets — method of joints, method of sections, shear–moment diagrams — built on a pure-JS exact solver with a reactive SVG viewer. Problems are defined as JSON models; the solver is verified by a 21-test harness. Six demo sets live, plus an experimental 3D viewer.
Linear-programming workbench: step-by-step simplex and Big-M tableaus computed live with exact fraction arithmetic and symbolic M, an SVG graphical view for 2-variable problems, a custom problem builder, a guided trainer, and two cheat sheets. The underlying Python solvers are included, cross-checked against scipy.
One topic module — series solutions and Cauchy–Euler equations, 12 problems — plus a methods cheat sheet, on a shared TutorCore engine with KaTeX rendering and progress tracking. Roadmap: a full course tutor on the statics-tutor architecture.