Go to google and copy this code and then in the "enter search terms" type what your looking for and you should be able to find it
Movies:

"Spider Man 3" Last-modified avi OR mov OR mpg OR mpeg OR mp4 "intitle:index of " -inurl:htm -inurl:html


Music

"ENTER-SEARCH-TERMS" -inurl:htm -inurl:html intitle:"index of" "Last modified" mp3 OR wma

Software

"ENTER-SEARCH-TERMS" -inurl:htm -inurl:html intitle: "index of" "Last modified" zip OR rar OR iso OR exel