http://synkron.sourceforge.net/
https://www.code42.com/crashplan/
https://www.bvckup2.com/
http://www.macrium.com/
http://www.cobiansoft.com/ (dated and have had issues with it)
http://www.allwaysync.com/ (have had issues with it)
http://ipmsg.org/tools/fastcopy.html.en
https://www.syncplicity.com/
https://en.wikipedia.org/wiki/Comparison_of_file_synchronization_software
