PS3, PS4, PS Vita and Xbox One are regain free for games. (I think there was one Japanese or American PS3 game that was region lock tho.)
Blu-ray movies and Xbox 360 games region lock is the publishers decision. For example Paramount who publish among over things the Transformers, GI Joe and (most) Marvel movies don't region lock. Fox on the other hand (Star Wars I - VI, Avatar, The Simpsons) loves to region lock.
DVD's (except region 0 DVDs), Wii, Wii U, some DS, 3DS and most PS2 era and earlier consoles are regain locked.
DVD region locks are 0: Region Free, 1: North Armerica and Japan, 2: Europe, 3: South East Asia, 4: Australia and South America, 5: Africa and the former USSSR countries, 6: China
Blu-Ray region locks are A: The Americas, South East Asia and Japan, B: Australia, Europe, Africa, C: China, Russia, the Asian sub-continent.
Games are NTSC-J: Japan, NTSC-US: North America, PAL: Rest of the World.