Category: Free Online Math Materials

Gratis, and sometimes libre, books, software, etc.

Torus Sketch

By Andrew D. Hwang on July 5, 2025

Torus Sketch is a simple, descriptively-named interactive program for drawing on a square torus. “Simple”…

By Andrew D. Hwang on July 3, 2025

Digitization of public domain ebooks at Distributed Proofreaders (DP) for Project Gutenberg (PG) involves collaboration…

By Andrew D. Hwang on July 2, 2025July 2, 2025

Theory of Finite Groups by William Burnside is among the most modern books I helped…

By Andrew D. Hwang on July 1, 2025

Augustus De Morgan was an eminent English mathematician and logician of the mid-19th century. The…

By Andrew D. Hwang on June 29, 2025June 29, 2025

Phosphene is a truchet tile board with a selection of tile shapes, colors, and board…