YARA - Yara is a popular tool that finds its use in helping researchers to classify and detect malware.
dirtyJOE - dirtyJOE - Java Overall Editor - homepage of binary java class file editor
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
MultiExtractor - MultiExtractor - Extract picture (JPG, PNG, GIF, BMP, ICO.
Recaf - Recaf is a modern java bytecode editor using Objectweb's ASM and JavaFX.
ExEinfo PE - Packer, compressor detector / unpack info / internal exe tools.