What XML Tools Do You Use?

Omega1045 asks: "What XML tools do you use? XML Spy? EditPad? A pen, notepad, scanner, and a good OCR program? XML is now becoming more than just hype. XML, SOAP Web Services, and Enterprise Integration (EI) are really taking off from the number and type of contract opportunities I am seeing and receiving. Until recently, I was doing most of my XML by hand. Other than the nostalgia for those early HTML days, it is really eating into my time. I have started trying XML Spy, but to buy it will be a big hit in the wallet (which I am willing to do if it is the best thing out there). What does Slashdot recommend?"