Looking for autocad equal for linux

Greetings, I can't find the autocad equal for Linux. I have played with it before but can't remeber what it is called and googling doesn't help because I can't remeber what it was called. I know the one I am looking for is GPL Please could you list the one you know I will recognise the one I am looking for Thanks guys -- Chadley Wilson Redhat Certified Technician Cert Number: 603004708291270 Pinnacle Micro Manufacturers of Proline Computers ==================================== Exercise freedom, Use LINUX =====================================