essential tools for .net programmer?

This question looks familiar with this: https://stackoverflow.com/questions/2187/essential-programming-tools, but I want to focus on .NET programming. Beyond Windows and Visual Studio, which tools are your daily-need to get your job done? Free, open-source code tools are preferred :)

I've been using these tools:

• Resharper - top of its class, but not free
• NUnit - trying to get us开发者_开发技巧ed with it.
• VisualSVN + TortoiseSVN

which other tools I should know and use?

http://www.hanselman.com/tools

Scroll down to section: A (.NET) Developer's Life

My recommendations

Firebug

Reflector

Anjlab SQL Server Profiler or even Microsoft SQL Server Profiler

PowerCommands

Visual Studio 2010 Pro Power Tools

Studio Styles

Expresso: Regular expression tool with .NET syntax.

LinqPad: +1 from Hanselmans's post above.

If you're into serious debugging or programming where you need to convert between Hex and Decimal go for a good converter, this will save lot of time, especially when debugging with error codes in hex etc. See http://onequestionatime.blogspot.in/2012/05/1-what-is-easiest-way-to-convert.html for a fast and easy converter