Mobile data sync solution in SQL and NoSQL space

I was working on mobile data sync from last two years but could not find a reliable solution, but finally I found these interesting solutions in both SQL and NoSQL Space-

One in the SQL space called Zumero and other in the NoSQL space called CouchBase lite.

Zumero provides support for SQL lite at the mobile endpoint and SQL Server / SQL lite at the server endpoint.

CouchBase lite supports a NoSQL document based and key-value based databases at both the ends.

Both seems interesting & I am going to experiment further with both of these..

http://www.couchbase.com/communities/couchbase-lite
http://zumero.com/