What software should be used to design with the CoolRunner family?
The XPLA3 family has been fully integrated into the Xilinx Foundation ISE and Alliance ISE products. The XPLA3 family is not available in the Foundation Aldec/Classic program.
A free version of ISE tools is available from the WebPACK site: http://www.xilinx.com/sxpresso/webpack.htm
For the obsolete XPLA devices (XPLA1, XPLA2, and 22V10), please see (Xilinx Answer 12342).