Bitmain they hold the top spot and will for a long time to come and i guess why we haven't heard much on the S7 is because of the sfards miner due out next month .
https://bitmaintech.com/product.htm
Spondoolies may or may not come back with a home miner they said they want to but well see .
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
http://www.spondoolies-tech.com/
This one is maybe but they want to much from all the rumors on pricing but i wouldn't put it past them .
http://www.sfards.com/
The Avalon4.1 Bitcoin Miner was one of the top three once it sold out they took the site off line and the Devper IS MiA.
and like alh
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
http://ehash.com/
I think you meant Friedcat and asic-miner tubes prismas block erupter's etc