Gbridge is a freeware that can do many functions like sync folders, share files between computers. It makes use of the Gtalk service to connect to remote PCs to perform various functions, you need a Google account to use this software.
It forms a VPN through Gtalk service to connect your own computers or your friends computers provided you both are friends in Gtalk. Using this you can access remote desktops of your friends and share your desktop with others. It securely share files between your own computers if you install Gbridge in all the computers you use. You can also share your files with your friends using this app, they will be able to access the files you share immediately.
Autosync feature allows you to keep the files in sync always, supports auto schedule, auto resume, incremental and no size limits on file sizes, so you can make use of it to sync big files easily. It can also backup files locally or remotely.
The software is really useful if you install the app on all your computers or your friends also use it as it offers several features.