Free Development Systems for Cell Phones?

mongoose(!no) asks: "Does anyone know of a free development environment for cellular phones? Right now, my phone has support for Qualcomm's BREW. Qualcomm offers a free SDK, to develop applications. However, to put the application on a phone, it costs $400 to become a BREW authorized developer. I am in the market for a new cell phone and am looking for one I could write applications on. Smart phones running Palm, and Windows CE are too expensive for my budget. Do I have any options or am I pretty much locked out of writing software for my cell pone?"