Mega - Secure File Storage and collaboration
Beyond Compare - Beyond Compare allows you to compare files and folders.
Dropbox - Online Sync and File Sharing
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
MediaFire - MediaFire is the simple solution for uploading and downloading files on the internet.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.