(In no particular order)
1. Just Beam It - Transfer files by dragging into your browser, then provide recipient with a link and download will commence. (Web based)
2. DropBox - File Sharing in the Cloud. Drop files into your public space and share them with other drop box users. I'm sure non drop box account holders can also view the public files via the website. (Uses the Dopbox app)
3. Drop Send - A very easy way to transfer files. Enter email address of recipient and drop the file. The recipient then receives an email with a link to collect the file. You also receive an email when the file has been collected. Seems it may have a limited free use. (Web Based)
7. LeapFILE - A more commercial secure file transfer site. Only the sender needs an account, so your customers would be able to download files easily.
8. Rapid Share - A very common file sharing website. Offers some for a cost, but some advertiser pay options.
9. You Convert - Not just a file conversion web app , but also offers file transfer.
10. Files over Miles - A direct P2P file transfer web app using your web browser.
So many different options out there and to many to list them all.