In my last project at work I used:

Technologies used in last project, in no particular order:

• ASP.NET MVC (2.0)
• SubSonic (3.0)
• MvcContrib
• Castle Windsor (for IoC)
• PostSharp (1.5)
  
• jQuery
• NUnit (for unit testing)
  
• T4MVC
• T4 (for lots of things including managing multiple configurations)
• m.spec (for integration testing)
• fit.net (for acceptance testing)
• dotLess
• RhinoMocks
• Yahoo YUI Compressor (for javascript compression)
• Hudson (CI Server)
• VMWare (for hosting CI & Test machines) SysAdmins choice

Technologies considered/evaluated but not used:

• Spark View Engine (for ASP.NET MVC) - Some initial configuration options and hard for web designers to work with.
  
• MongoDB (as an alternative database) - not used as deemed unsuitable for highly transactional nature of data used by system.
• Visual Studio 2010 & .NET 4 - Reluctant to commit to using unstable betas. Didn't want to have to make a change part way through a relatively short and pressured development cycle.
  

This was all to produce:

• Websites
• Web Services
  
• WinForms Apps
• CF WinForms Apps
• WPF Apps