A list of ETFs

Ultra MarketCap
Ultra QQQ--------------------QLD
Ultra Dow30------------------DDM
Ultra S&P500-----------------SSO
Ultra MidCap400--------------MVV
Ultra SmallCap600------------SAA
Ultra Russell2000------------UWM

Ultra Style
Ultra Russell1000 Value------UVG
Ultra Russell1000 Growth-----UKF
Ultra Russell MidCap Value---UVU
Ultra Russell MidCap Growth--UKW
Ultra Russell2000 Value------UVT
Ultra Russell2000 Growth-----UKK

Ultra Sector
Ultra Basic Materials--------UYM
Ultra Consumer Goods---------UGE
Ultra Consumer Services------UCC
Ultra Financials-------------UYG
Ultra Health Care------------RXL
Ultra Industrials------------UXI
Ultra Oil & Gas--------------DIG
Ultra Real Estate------------URE
Ultra Semiconductors---------USD
Ultra Technology-------------ROM
Ultra Telecommunications-----LTL
Ultra Utilities--------------UPW

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Short MarketCap
Short QQQ (100%)-------------PSQ
Short Dow30 (100%)-----------DOG
Short S&P500 (100%)----------SH
Short MidCap400 (100%)-------MYY
Short SmallCap600 (100%)-----SBB
Short Russell2000 (100%)-----RWM
UltraShort QQQ---------------QID
UltraShort Dow30-------------DXD
UltraShort S&P500------------SDS
UltraShort MidCap400---------MZZ
UltraShort SmallCap600-------SDD
UltraShort Russell2000-------TWM

Short Style
UltraShort Russell1000 Value-----------SJF
UltraShort Russell1000 Growth----------SFK
UltraShort Russell MidCap Value--------SJL
UltraShort Russell MidCap Growth-------SDK
UltraShort Russell2000 Value-----------SJH
UltraShort Russell2000 Growth----------SKK

Short Sectors
UltraShort Basic Materials-------------SMN
UltraShort Consumer Goods--------------SZK
UltraShort Consumer Services-----------SCC
UltraShort Financials------------------SKF
UltraShort Health Care-----------------RXD
UltraShort Industrials-----------------SIJ
UltraShort Oil & Gas-------------------DUG
UltraShort Real Estate-----------------SRS
UltraShort Semiconductors--------------SSG
UltraShort Technology------------------REW
UltraShort Telecommunications----------TLL
UltraShort Utilities-------------------SDP

Short International
Short MSCI Emerging Markets (100%)-----EUM
Short MSCI EAFE (100%)-----------------EFZ
UltraShort MSCI EAFE-------------------EFU
UltraShort MSCI Emerging Markets-------EEV
UltraShort MSCI Japan------------------EWV
UltraShort FTSE/Xinhua China 25--------FXP

Short Fixed Income
UltraShort Lehman 20+ Year Treasury----TBT
UltraShort Lehman 7-10 Year Treasury---PST

Sectors
The Consumer Discretionary Select Sector SPDR Fund - XLY
The Consumer Staples Select Sector SPDR Fund - XLP
The Energy Select Sector SPDR Fund - XLE
The Financial Select Sector SPDR Fund - XLF
The Health Care Select Sector SPDR Fund - XLV
The Industrial Select Sector SPDR Fund - XLI
The Materials Select Sector SPDR Fund - XLB
The Technology Select Sector SPDR Fund - XLK
The Utilities Select Sector SPDR Fund - XLU

Source:
http://www.sectorspdr.com/aboutspdrs/
http://www.proshares.com/fundsund