Programs for Windows and Linux

Small, home-made programs for design, calculation, games and modding. Free to use, for Windows and Linux.

Programs

Contour-Studio

Design a pattern around an outline and export it to CAD or a 3D printer.

English and Dutch

GearLab

Calculate, draw and export involute gears.

English and Dutch

Chain & Sprockets

Calculate, draw and export a roller chain with sprockets.

English and Dutch

Serious Sam TEX Converter

View and convert textures from Serious Sam 1, 2 and 3.

English

Serious Sam UV Unwrapper

Prepare 3D models for Serious Modeler, and paint on them in 3D.

English

PwManager

A simple password manager that keeps everything on your own computer.

English and Dutch

Sudoku

Sudoku at four levels, with checking and hints.

English and Dutch

Made with PureBasic

All TheiSoft software is made with PureBasic. It is a BASIC-style programming language that produces fast, small programs without extra components you have to install.

From the same source code PureBasic builds a program for Windows, Linux, macOS and Raspberry Pi OS (and in the past also for AmigaOS). That is why the TheiSoft programs run on both Windows and Linux.

Want to start programming yourself? There is a free version of PureBasic for smaller projects.

More about PureBasic at purebasic.com

About TheiSoft

TheiSoft is the name under which Thei van Duin makes programs: first for personal use, and now for anyone who finds them useful.

Many of the ideas and pieces of code date back to around the turn of the century. Thanks to PureBasic and Claude they have now been given a solid form, good enough to publish here.

All programs run on Windows and Linux and keep your data on your own computer. They do not connect to the internet.

Concept and design: Thei van Duin. Programming with help from Claude, the AI assistant made by Anthropic.