fpga4fun.com

Ok, I'm REALLY new to FPGAs and VHDL, and I just installed Quartus II Web Edition. I coded up a quick carry look-ahead adder with some help from one of the VHDL samples on the Altera website... But I'm wondering what I need to be able to simulate my VHDL code, without actually using an FPGA. I currently don't have the money for anything, so I'm trying to set up a free development environment to toy around with and learn in.