YARA - Yara is a popular tool that finds its use in helping researchers to classify and detect malware.
VB Decompiler - VB Decompiler Perfect source code recovery solution for Visual Basic 5.0/6.0 applications and fast disassembler for Visual Studio .NET compiled apps
ReFox - ReFox XI, FoxPro code protection, compression and recovery.
MultiExtractor - MultiExtractor - Extract picture (JPG, PNG, GIF, BMP, ICO.
Recaf - Recaf is a modern java bytecode editor using Objectweb's ASM and JavaFX.
.NET Reflector - .