JumpingBytes PureSync
PureSync is a easy synchronisation tool (free for personal use). You can download it here http://www.jumpingbytes.com/en/puresync.html
The installer accepts msi-Parameters and is easy to package
<package
id="puresync"
name="JumpingBytes PureSync"
revision="3.6.1"
reboot="false"
priority="0">
<check type="uninstall" condition="exists" path="PureSync 3.6.1" />
<install cmd='"%SOFTWARE%\jumpingbytes\PureSyncInst.exe" /qb' />
<upgrade include="install" />
<remove cmd='msiexec /qn /X{153F529B-694F-44D7-8C90-E9036281B3E9}' />
</package>