We use a ton of Visual Studio plugins. CodeRush is one of them. Its templates are awesome, and its got a few nice refactorings that Resharper doesn't have. They're a little tricky to get working together, but not impossible. One thing I use a ton is GotoType under Resharper. One thing I find myself doing all the time is going between a class and it's fixture. Because I couldn't see anything else that would do it, I tossed together a CodeRush plugin for that very thing.
You just bind a key (I use Ctrl+Shift+X) to Eleutian Goto Fixture. All it does is do a regular expression search through type names in your solution. Say you're on HomeController. Because the class name doesn't end in "Tests" it will look for one that ends with "HomeControllerTests". If the class were HomeControllerTests, it would strip the suffix off and look for a class with a name that ends with "HomeController". It's missing a few things I still want. For example, for multiple matches I would like a menu, or the ability to cycle through them a la tab completion. I'm not sure of the best way to do the menu and haven't decided if I'll just do the cycling. If there's interest I'll think more about it.
There are a few optimizations, the first is that it will only look in projects ending with ".Tests" when looking for the test fixture. Also, it will keep a rolling queue of the last 10 types you jumped from and check those first. Both are handy when you have 40 projects and tons of classes. I started off with other loftier goals for the plugin, which might explain why there's so much other code.
In order to install this thing drop the binaries into your C:\Program Files\Developer Express Inc\DXCore for Visual Studio .NET\2.0\Bin\Plugins directory. Start Visual Studio and choose DevExpress | Options and then find the Shortcuts tab. In there, you can add a new shortcut (there's an icon in the lop left) and bind the keystroke you desire to the Eleutian Goto Fixture command.
It's my first CR plugin, so forgive me.
Source and Binaries