Another one is AlfaAlfa's SQL Server Comparison Tool (SCT)

http://www.sql-server-tool.com

- also not free, but it has 30 days of free evaluation period, which
can be extended to 90 days. Comparisons can be fully automated
through the usage of command line parameters.

SCT works with SQL Server 2005, 2000 and 7.0 and between these
versions.


Dariusz Dziewialtowski.