Ghidra is a software reverse engineering (SRE) framework

A tool for reverse engineering Android apk files

Algorithms, 4th edition textbook code and libraries

A better compressed bitset in Java: used by Apache Spark, Netflix Atlas, Apache Pinot, Tablesaw, and many others

Implementation of Algorithms and Data Structures, Problems and Solutions

Quickly find differences and similarities in disassembled code

a multi-CPU ZX-Spectrum 128 concept platform

MDL (a Z80 assembler optimizer)

Karnaugh map simplification software, used to visually simplify boolean expressions

Adds support for writing animated GIF, PNG8, and animated PNG (including full-color) from libGDX

La Abadía del Crimen • Java & GWT

Tool support and visualizaton of Assembly Language within Eclipse, and integrated with IDA Pro. Can also be used as a standalone executable.

Conversion of Knight Lore to the TI-99/4A

De-archiver for various RISC OS archive formats

Atari 8-bit port of Prince of Persia

UEF Loader for Ghidra

A ZX Spectrum emulator with network play capabilities.

A java based open source re-make of a fantastic 80's game...

A viewer for RISC OS StrongHelp files written in Java Swing