Oil and Coal, mostly. Natural Gas, as well. Throw in Nuclear.
All of these can be developed economically without subsidy if the government would just step aside and let it happen. There is no need to pine for Pie-In-The-Sky whey we have plenty of pies on our plate.
Looks like fossil fuels & nukes get some hefty subsidies to me.
Source: http://www.awea.org/pubs/factsheets/Subsidy.pdf