Eagle CAD is a Electronics schematic/PCB layout tool.
LogicWorks is used for designing electronic circuits and testing them, it is not used for creating schematics or layouts on PCB.
Xilinx has their ISE suite for programming/debugging FPGA's
None of the above are particularly cheap, but most of them have demo's available.
In electronics you don't have blue prints, you have schematics. They are approximately the equivalent but still entire different. CAD only stands for Computer Aided Design. That covers almost every thing. Anything that is design and can be aided by a computer. Electronics are designed just as much as houses, as cars, as computer casings.