Our library is a blazingly fast C++ DLL that is natively integrated in Excel and that is embeddable with no effort in third party applications that can link standard DLLs. Standard apps, web apps, .NET apps can all take advantage of the algorithms inside our library.
We used a technology on Windows that is compatible with Excel 2007 and Excel 2010 and we will maintain the compatibility with future releases of Excel on Windows.
The Mac OS X implementation comes packaged as a shared library that you can use in your projects and as a callable set of macros that allows you to use our powerful algorithms despite the limitations of Excel 2011 for Mac.