There are hundreds of file recovery programs.
A good free program is RECUVA
..
Thank you for reading my question here! Sony camera has some problems and needs formatting process to fix. So, I have formatted this camera and found all camera photos and videos inside are lost meanwhile. So, I just think perhaps, without right ways, I also have chances to view my camera photos and videos again. Am I right? What way should I use to take my stuffs back? Please, help me... Thanks!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic