Invisible Basic is an Excel Add-in that compiles the VBAcode within an Excel Workbook into obfuscated (very hard to understand) but functionally equivalent code. Simply "Save Invisibly" to share your Excel solutions...without sharing their source code.
XML^2 ("XML to square", you can write also xml2sqr, "eXtensible Module Language by eXtensible Markup Language"), is a development framework, based on an XML-based scripting language, translated by an interpreter/compiler in vba, C# or Java.