stargate modelling question

I see a youtube video about stargate modelling and I don’t know how I make that and how program I use.

please you can help me?

[editline]03:43PM[/editline]

I have the link for the video: http://www.youtube.com/watch?v=1o3h0nQxWu4&feature=PlayList&p=77FCEDBCFDE36B06&playnext=1&playnext_from=PL&index=11