Big Boom is a great WordPress theme build on 960 Grid system.
Features:
PSD files:
BigBoomTemplate-AboutUs.psd BigBoomTemplate-BlogList_oneColumn_search.psd BigBoomTemplate-BlogList_oneColumn.psd BigBoomTemplate-BlogList.psd BigBoomTemplate-BlogPost.psd BigBoomTemplate-Contact.psd BigBoomTemplate-Features.psd BigBoomTemplate-Gallery_double.psd BigBoomTemplate-Gallery_oneCollumn.psd BigBoomTemplate-Gallery_oneCollumnText.psd BigBoomTemplate-Gallery_oneCollumnTextHorizontal.psd BigBoomTemplate-Gallery_project.psd BigBoomTemplate-Gallery_triple.psd BigBoomTemplate-MainPage.psd BigBoomTemplate-MainPageBoxed.psd 
