Software Usage in Clay Quantification Contests

I always get intrigued about how many people in Houston texas are using each of the following software.  Unfortunately, I don't know anything.

Here is the software usage for the top places in Reynold's cup. 

Year	Gold	Silver	Bronze
2002	BGMN/AQ	BGMN/AQ	XLSMin, RockJock
2004	0.5SiroQT, 0.5Topas	Quanta	BGMN/AQ, XLSMin
2006	Quanta	XLSMin	BGMN/AQ
2008	XLSMin	2xBGMN/AQ	BGMN/AQ, SiroQT, FullPat, RockJock
2010	SiroQT	RockJock	BGMN/AQ
2012	BGMN/AQ	XLSMin	BGMN/AQ
2014	BGMN/AQ	XLSMin	2xBGMN/AQ