From Binary Fortress Software:
ASP.NET ViewState Helper is designed to help all web developers, but has specific features to help ASP.NET developers track ViewState issues. Analyze your web pages in real-time while you browse them using Internet Explorer 6.0 or higher. ASP.NET ViewState Helper gives you very detailed information to help you optimize your Web applications performance.
What's new in this version:
Version 1.4.5 improved performance and memory usage.