phenry:
Hi wanderson,
thank you for your answers.
BASCOM is the only commercial product being actively supported. FastAVR is no more developed since 2006 at my knowlege.
As for my compiler, it will be FREE for arduino, completely freeware.
Later we will enhance it to add support for all AVR chips and we will sell it as commercial product, but arduino version will remain Freeware !
More power to you; however, since one such product ceased production, I doubt there will be enough of a market to pay for your development costs. much less make any kind of profit, particularly if you offer Arduino versions for free. In my opinion, the Arduino market is the one most likely (and not very, IMO) to be interested in such a product.