Merge and synchronize data between databases.
Editor: The Database and XML Toolkit (DbTkXml) provides the following basic database functions:

Export data from a your database to DBF, XML, CSV, HTML or TXT format
Merge, Migrate and Synchronize entire data sets Between Databases (export + import with dbload)
SMART data import into your database from DBF, XML, CSV and TXT with DbLoad
if record is found - update non key fields, if new add new record - avoiding duplicate data
Automate repetitive database tasks (using DbScript or Batch command line utilities)
All functions conveniently available in the interactive Database Explorer
Create your own database tools with the DbTkXml function interface
Publish your database tables with Db2Html
Analyze your data (database data or external DBF, XML, CSV, HTML or TXT files) with DbAna
Create a new Database from DBF, XML, CSV or TXT data (or DbAna analysis result)
Execute SQL scripts calculating, extracting or manipulating data (DbSql)
Convert FoxPro/DBF databases to compatible format (DbfConv.exe) you can free download Database and XML Toolkit (DbTkXml) 1.4e now.