Folder Marker - Change folder color in two mouse clicks for easy at-a-glance identification.
Google Drive - Access and sync your files anywhere
Folder Painter - Folder Painter is an easy to use Portable Freeware program, which allows you to change the color of the icon representing a chosen folder to any color you like
ShareFile - Secure file sharing and sync
Teorex FolderIco - FolderIco allows to change the color of Windows folder in one click!
Dropbox - Online Sync and File Sharing