Free mass file-mirroring service's like RapidSpread and UploadJockey are quite popular these days, but here is something which beats these services hands down - Zoom’s File & Image Uploader is a free utility which takes the pain out of creating mass file and image mirror's to more then 70 file and image hosting services including mass-mirror services like RapidSpread and UploadJockey.
The portable utility features a fully functional drag-n-drop interface with ability to use premium accounts with parallel uploading support, the only thing missing is the handy Windows context-menu integration for fast access, this should be expected in upcoming releases.