DE0-Nano-SoC develop environment, free version of IDE?

I use WIN7/WIN8 to develop the DE0-Nano-SOC board.

If you have interest in the design tool Quartus II, just go https://www.altera.com/products/design-software/fpga-design/quartus-prime/download.html, you will find the so-called Lite Edition.

FPGA is fantastic in a way, while for a new beginner , it may have a long way to go, actually, you may retrospect some threads for very useful tips, I've find something cool here. ; )