MultiExtractor - MultiExtractor - Extract picture (JPG, PNG, GIF, BMP, ICO.
Decompiler.com - Online Java and Android decompiler. Just drag and drop .JAR or .APK file and browse decompiled content online.
ReFox - ReFox XI, FoxPro code protection, compression and recovery.
ILSpy - ICSharpCode. Decompiler. Console..
YARA - Yara is a popular tool that finds its use in helping researchers to classify and detect malware.
dnSpy - .NET assembly editor, decompiler, and debugger