This web site:
Describes methods for forecast verification, including their characteristics, pros and cons. The methods range from simple traditional statistics and scores, to methods for more detailed diagnostic and scientific verification.
Gives examples for each method, with links and references for further information. The examples are all drawn from the meteorological world (since the people creating this web site are themselves meteorologists or work with meteorologists), but the verification methods can easily be applied in other fields. They are appropriate for verifying estimates as well as forecasts.
Demonstrates the verification techniques on a handful of forecast examples. These data will be available for download if you want to try out some of the techniques.
Does not provide source code (sorry, but what language would we use?). However, the simple methods are relatively easy to code, and the complex ones give references to people who have developed them or are working on them.
Is a dynamic site - please contribute your ideas and verification methods, also suggestions for making the site better.