Ilspy – ILSpy is the open-source .NET assembly browser and decompiler.

DotPeek – dotPeek is a free-of-charge standalone tool based on ReSharper’s bundled decompiler. It can reliably decompile any .NET assembly into equivalent C# or IL code.

vb5.0/6.0 VB Decompiler Lite 11 (p-code, VB6) – Best code recovery solution for Visual Basic 5.0/6.0 applications and fast disassembler for Visual Studio .NET compiled apps.

WKTVBDebugger– A debugger for Visual Basic P-Code compiled apps.

Semi-vd-decompiler – Partial decompiler for Visual Basic.

P32Dasm – VB5/VB6 Pcode decompiler.

Numega SmartCheck

Delphie DeDe – DeDe is a very fast program that can analyze executables compiled with Delphi.

AutoIt AutoIt3 DecompilerThis application can be used to decompile AutoIt scripts.