Ghidra is a software reverse engineering (SRE) framework

Dex to Java decompiler

A tool for reverse engineering Android apk files

Vulnerable Android application for developers and security enthusiasts to learn about Android insecurities

DIVA Android - Damn Insecure and vulnerable App for Android

Automated HTTP Request Repeating With Burp Suite

MARS (original) MIPS Assembler and Runtime Simulator