This page provides a collection of small computer programs for one-player puzzle games that run on Unix, Windows, and the web using Java or Javascript applets. The author apologizes for no longer being able to build the MacOS version due to technical issues. The games are not original creations, but re-implementations of existing concepts within a portable puzzle framework. Each game has web versions available, as well as Windows binaries and manuals. The MIT-licensed puzzle collection includes various challenging games like Black Box, Bridges, and Filling. Developers can contribute new puzzles or front ends to expand the collection’s availability on different platforms.
https://www.chiark.greenend.org.uk/~sgtatham/puzzles/