Culture Explorer 2.0 is an amazing Windows Form application that lets you explore the cultures that are supported by the .NET Framework 2.0. It provides details for each culture such as date, time, number, currency formating, calendar information...
It also support .NET 2.0 features such as custom cultures.
I tested it and let me say that the author did a really good job!
The UI is nice, it is free and C# source code is provided!
Read the full post with nice screenshots from the author Michael S. Kaplan :