I just added another tool to my PC tool belt today thanks to Jeff Atwood.  This got me thinking about all the tools I use for development and just general day to day use of my PC.  Here's a list of one's that I use pretty often.

Development specific tools:

• Consolas Font Family for Visual Studio 2005/2008 - Makes a nice legible Visual Studio font
• Fiddler2 - Good for debugging anything over HTTP
• GhostDoc2 - Quick start my class and method documentation - intelligently.
• HM NIS Edit - IDE for NSIS installers.
• IE Developer ToolBar - Firebug light...
• ReSharper 4 - VS Refactoring tool.
• MBUnit - xUnit tools for .NET
• NUnit - xUnit tools for .NET
• Firebug - Firefox plugin for debugging JavaScript, CSS, and HTML.  Absolutely essential for any web dev.
• YSlow - Yahoo's web performance analysis tool.
• WatiN - I use this to drive tests through IE.  Its pretty easy to setup and use.  The newest version supports FireFox!
  
• Notepad++ - Opens as fast as Notepad, but has tabs and syntax highlighting.  It comes with a nice installer which adds it to the IE view source context menu.
• SharpDevelop - Used for editing Boo/Brail.  I think I also used this when I was developing Mono applications on Ubuntu.
• Subversion - This is what I use for source control at work and at home.
• Tortoise SVN - Explorer plugin for Subversion.
• Visual SVN - Non-intrusive Visual Studio plugin for Subversion that just works.
• Visual Studio 2005 - My C#/C++ IDE.
• Visual Studio 2005 SP1 - You gotta have web projects.
• Visual Studio 2005 Extensions for .NET 3 - Use this mainly for WCF.
• CSAH - Allows you to cut and paste as HTML from Visual Studio.  Essential for blog posts.
• Syntax Highlighter for WLW - This one works well with every programming language I use.
  
• SQL Server 2005 Dev Edition - Primarily the DB I use.
• SQL Server CE - Sometimes use this for unit tests with NHibernate.
• MySQL - Started using this recently, the installer for Windows makes it dumb easy to setup.
  
• Java SDK 1.6 - uh yeah.
• Eclipse - Sometimes need this for Java (and C++ programming on Linux).
• ActivePerl - Our C++ xUnit test framework requires this.  There's a free version if you click the right link.
• CxxTest -C++ xUnit test framework.
• RhinoMocks - Fluent mock object framework for .NET.
  
• PowerShell - A powerful Windows command shell.
• CruiseControl.NET (CCTray) - Keep the team in touch with the build.
• WinMerge - Nice merge/diff tool especially considering that its free like beer.
• TestDriven.NET - Since I'm now force to use MSTest, this an essential tool to keep the TDD rythm.
• FxCop - Nice to run every once in a while... to catch stuff, especially related to globalization.

Non-Development specific tools:

• Virtual PC 2007 - Use this run virtual PCs, generally for integration testing.
• Miranda IM - I get tired of having multiple IM clients, this allows me to use them all at once (and it's OSS).
• Pidgin - Multi-function IM client which just works.  Much better than Miranda.
  
• Firefox3 - My preferred browser, which runs JavaScript heavy sites fast.
  
• 7-Zip - An awesome zip/tar/rar/whatever utility.
• FoxIt PDF Reader - A light and fast version of Adobe Reader that doesn't constantly nag me about updates.
• ClipX - My newest install, this one allows you to maintain a clipboard history.  I'm loving this one.
• DisplayFusion - I generally just use this to drag maximized windows between monitors.
• Windows Live Writer - What I write this blog on.
• Paint.NET - A powerful .NET paint and photo editor package.  I've dumped my old copy of Photoshop 7 for this.
• Launchy - Since I'm stuck on XP, this makes finding and starting programs uber quick.
  

The one overriding theme of all these packages is that most of them are free and/or OSS.  Pretty cool.