: You can typically check the Intel FPGA Software Download Center for archived versions.
It is known for being a stable environment for 32-bit and 64-bit Windows and Linux systems. Key Features of the 13.0 Release altera quartus ii 13.0 free download
You must specifically download the .qdz files for your target family (e.g., Cyclone II/III/IV). : You can typically check the Intel FPGA
The Web Edition is free and does not require a paid license file for synthesis. altera quartus ii 13.0 free download