Mac users interested in Yousendit version 2.11.5 generally download:
YouSendIt Express is a desktop client for the YouSendIt service. YouSendIt allows you to send files to anyone who has an e-mail address. No files are attached on the e-mails sent by this application, though. All that is sent is an e-mail with a download link. The actual files that you send are hosted on the YouSendIt servers.