decompiler

The free binary code analysis tool to kickstart your reverse engineering experience.

JPEXS Free Flash Decompiler (FFDec) is opensource flash SWF decompiler and editor. Extract resources, convert SWF to FLA, edit ActionScript, replace images, sounds, texts, fonts and more. Various output formats available.

Reko is a binary decompiler.

Cross-Platform .NET assembly browser and decompiler.

A decompiler for GameMaker 8.x executables

Command line and GUI tools for producing Java source code from Android Dex and Apk files

dnSpyEx is a unofficial continuation of the dnSpy project which is a debugger and .NET assembly editor.

GUI Application to work with engine assets, asset bundles, and serialized files.

The most complete tool for modding, decompiling and unpacking Undertale (and other Game Maker: Studio games!)

A 2-in-1 Java decompiler based on JD-Core v0 and v1

A collection of tools for those interested in reverse engineering and/or malware analysis on Windows systems.

Another free Win32 resource editor