| slideshare.net | 8 |
| scribd.com | 8 |
| issuu.com | 8 |
| megaupload.com | 7 |
| mediafire.com | 7 |
| digital.library.upenn.edu | 7 |
| ziddu.com | 6 |
| rapidshare.de | 6 |
| esnips.com | 6 |
| docstoc.com | 6 |
| btjunkie.org | 6 |
| box.net | 6 |
| authorstream.com | 6 |
| asksam.com | 6 |
| 4shared.com | 6 |
| zshare.net | 5 |
| wattpad.com | 5 |
| uploading.com | 5 |
| sharingmatrix.com | 5 |
| senduit.com | 5 |
| powershow.com | 5 |
| myplick.com | 5 |
| letitbit.net | 5 |
| keepandshare.com | 5 |
| ifile.it | 5 |
| hotfile.com | 5 |
| hongkiat.com | 5 |
| fliiby.com | 5 |
| filestube.com | 5 |
| filefactory.com | 5 |
| fileden.com | 5 |
| edocr.com | 5 |
| depositfiles.com | 5 |
| calameo.com | 5 |
| badongo.com | 5 |
| 2shared.com | 5 |
| slingfile.com | 4 |
| slideworld.com | 4 |
| slideserve.com | 4 |
| leokrut.com | 4 |
| easy-share.com | 4 |
| docuter.com | 4 |
| datafilehost.com | 4 |
| kewlshare.com | 3 |
| doocu.com | 3 |
| bitroad.net | 3 |
| persianupload.com | 2 |
| midupload.com | 2 |
| host-a.net | 2 |
