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Behavior Driven Development (BDD) with SpecFlow and ASP.NET MVC.
Extensible Web portal for gathering and displaying information about source code projects.
Kanban and When Will This Be Done? (Dennis Stevens on making predictable feature estimates).
Good MVP vs. MVC comparison by Glenn Block on Stackoverflow.
Mikado method for large scale refactoring (so silly of me to miss a workshop on this at XP2010.