ILSpy is the open-source .NET assembly browser and decompiler.
x64dbg is a 64-bit assembler-level debugger for Windows. The corresponding 32-bit debugger is called x32dbg.Key features: * Open-source
JustDecompile is a stand-alone, free decompiling tool which converts .NET assemblies into source code. This Free Download Gives You
dnSpy is a tool to reverse engineer .NET assemblies.
Java decompilers online: *JAD, *JDCore, *Procyon, *Fernflower, *CFR.
? A user interface to extract source code from .class and .jar ‘binary’ files.
The C Decompiler for Windows x64. Global analysis with automatic type detection. Interactive GUI. Free edition.
The program is no longer updated. Last version, 1.11, released in 2001, can be still downloaded from SoftPedia.
Cavaj Java Decompiler is a graphical freeware utility that reconstructs java source code from CLASS files.