Lpc2000

>> I agree. A lot of Philips users use Keil, but they're not so popular
among Atmel, Freescale, or TI users. In fact, I think Philips is
probably the only ARM vendor that shows Keil tools in the #1 spot. <<

It's Infineon I associate Keil with. They make a very good IDE for the 
XC166 - as well as Tricore and (obviously) 8051 tools which I haven't 
played with.

Cheers,

Rob