This is one of those things that I really have gotten addicted to and dependant on. It allows you to set aside a folder on each of your computer and all the time make sure that the content in those folders are exactly the same. Edit a file at home, on your work pc you find the new version ready when you get there. Download stuff on your laptop and it will be available on the rest of your computer within seonds/minutes.This is a free offer from Microsoft and I have been using it mostly to put my currently editing documents in. I am sure there are other equally good uses, like keeping Firefox extension available on all computers, or having your set of reading articles available no matter which of your computers you are in front of.You can also share folders with friends and family with this nifty software, and you can access your shared computers online, as long as they are powered on. I have tried a few other syncing solution, but this one is my favorite so far along with Syncplicity. The latter also keeps back up of your sync’ed folders online.Feel free to offer more clever uses in the comments!