Complex sentence: YouSendIt is a file collaboration service that allows users to send, receive, digitally sign and synchronize files from YouSendIt.com, a desktop client, mobile devices, or from within business applications with a YouSendIt plugin.
Split into simpler sentences: YouSendIt is a file collaboration service that allows users to send, receive, digitally sign and synchronize files. It can be used from YouSendIt.com, a desktop client, mobile devices, or from within business applications with a YouSendIt plugin.