SharpToolbox is two-year-old
Two years after, it references 680 tools including 186 libraries in 49 categories. To date, 33 tools have been flagged as discontinued.
I believe SharpToolbox is a comprehensive directory of the available tools for .NET. Let's hope its sister site, JavaToolbox, will have the same future.
I continue to add improvements to the sites. Soon I will improve the search and filter functions.