What type of instruments are used to make this music?

How do you make it? What software or whatever?

http://www.youtube.com/watch?v=y98I9LhtkNE

http://www.youtube.com/watch?v=Pr-ATVc345E

http://www.youtube.com/watch?v=SOJpd36dBuAfeature=related

http://www.youtube.com/watch?v=pUaPZyZIyAgfeature=related