Funambol and db4objects have
Funambol Connector for db4o.
"The Funambol Connector for db4o makes it easy for software developers
to store and manage complex information in an embedded database on mobile
devices such as laptops, smartphones and PDAs. The combination of Funambol
and db4o eliminates the need to write extensive code to manage and extract
data from complicated data structures and gives users a wide range of
mobile devices to access complex data while on the go.
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