If you use Google Docs for storing & sharing files, here’s nice tool, “Google Docs Batch Upload” – is a command-line Java application that helps in uploading multiple, work in Windows, Mac, Linux, as long as you have JRE 1.6. List of supported formats include: csv, doc, docx, html, htm, ods, odt, pdf, ppt, pps, rtf, sxw, tsv, tab, txt, xls, xlsx. Use the following command to upload all the files from a folder and all its subfolders: java -jar google-docs-upload-1.0.jar <path> --recursive (replace <path> with the path to the folder you want to upload).

Download: Google Docs Batch Upload