SparkleShare and DVCS-Autosync are in Trisquel's repository:
http://sparkleshare.org https://www.mayrhofer.eu.org/dvcs-autosync I have heard of Syncany too: https://www.syncany.orgAn alternative is to administrate your own server where you can install ownCloud (in Trisquel's repository): https://owncloud.org
