This is a collection of tools you may like if you are interested in reverse engineering and/or malware analysis on x86 and x64 Windows systems. After installing this program, you'll have two ways to access the tools:
Double-click the retoolkit icon in the Desktop.
Right-click on a file, choose Send to -> retoolkit. This way the selected file is passed as argument to the desired program.
Why do I need it?
You don't. Obviously, you can download such tools from their own website and install them by yourself in a new VM. But if you download retoolkit, it will probably save you some time. Additionally, the tools come pre-configured so you'll find things like x64dbg with a few plugins, command-line tools working from any directory, etc. You may like it if you're setting up a new analysis VM.