YARA - Yara is a popular tool that finds its use in helping researchers to classify and detect malware.
Detect It Easy - Detect It Easy - Simple software to analyze a file, determine its type and packer
ReFox - ReFox XI, FoxPro code protection, compression and recovery.
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
OllyDbg - OllyDbg is a 32-bit assembler level analysing debugger.
MultiExtractor - MultiExtractor - Extract picture (JPG, PNG, GIF, BMP, ICO.