Lester Lobo’s XamlPadX
Lester just posted a private update to XamlPad (the very one that ships with the Widnows SDK) that gives it some very cool new functionality. Some of this is the standard stuff that you would expect: Kaxaml and notepad style stuff like Find / Replace / Goto. My favorite feature, howver, is a simple command interpreter that lets you write simple code to interact with objects in your tree on the fly.