viewstate is a decoder and encoder for ASP .Net viewstate data. It supports the different viewstate data formats and can extract viewstate data direct from web pages. viewstate will also show any hash applied to the viewstate data.
eDemonOnline is a set of libraries for ASP .NET. It includes the PHP .NET sub-project(a port of PHP functions library to the .NET framework) along with a collection of web controls, class libraries and tools. For more info see the documentation section.