Listed below are the some of the online tools that can be used for uploading files to multiple hosting sites at the same time.
UploadJockey uploads files to free hosting sites like Rapidshare, Badango, Sendspace, Zshare, Megaupload and Depositfiles. This also provides option to earn money when you upload file. Max upload size of the upload should not exceed 100 MB.
Gazup is another free upload service which allows users to upload files to several file hosting sites such as RapidShare, MegaUpload, FileFactory, HideMyAss, Badongo, Mediafire, Uploadbox, zShare, and NetLoad.in
DropRecord is free tool which allows user to upload a single file multiple hosts simultaneously, this is currently in beta mode. This upload files to RapidShare, MegaUpload, Easy Share, Deposit Files, ZShare, FileFactory, Send Space, Fly Upload, Zippy Share, Badongo, NetLoad, Loadto, MediaFire, MegaShare, HotFile and TwoShared. This is also provides trends such as latest searches, top searches, latest files and top files. And the max upload limit of a single file is 500 MB.
MassMirror allows user to upload files to multiple hosting sites. This allows provides a desktop based tool which can upload multiple files using queue system.
RapidSpread is another free upload service which allows users to upload files of unlimited size to different hosting sites.