Arc is a great open source app for cross-platform file sharing Before we get into it, do note that Arc is still in beta. So, you may stumble upon some problems, even though it was fairly stable ...

The app, Pipe, melds peer-to-peer technology with your social graph to enable a cutting-edge new way to share… files? Indeed, Pipe will be the only file transfer utility on Facebook.

GroupLogic has released a file syncing and sharing application that offers the same convenience as Dropbox but with enterprise-level management and security features.

You'll no longer need a third-party app to send files easily between your Microsoft computer and Apple device.