I should have been more specific with my question. I meant bitcoin mining software, like CGMiner, not hardware. My apologies for the lack of clarity.
And by popular I mean the following: out of all the people mining bitcoins in the world, what bitcoin mining software is most used (top 5 would be great). I understand CG Minger is pretty popular, but it seems pools have their own proprietary miners.
Cheers
Btc mining software is pretty much cgminer, and bfgminer. That is really the two most used a lot have cgminer in background you might not even know your using it. For example many miners have a nice GUI frontend with cgminer running behind it.
What miner are you looking at? Really asics is what it all comes down to in BTC mining now.