SQL Sentry Plan Explorer has a number of views available to help you understand the rich information stored within Execution Plan files. It also can provide you with additional details when you run Get Actual Plan on the query directly.
Using Analysis Services Stored Procedure to customise drillthrough and to implement context-aware drillthrough. This is a #SQLCoop post.
This blog post shows an example to perform ABC Classification using SUM and a SQL Server Window Function,