Datanamic SchemaDiff MultiDB 4.0.2 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus.
The program lies within Development Tools, more precisely Database Tools. This program is a product of Datanamic Solutions BV. The most popular version of the software 4.0. Schemadiff4.exe or schemadiff_multidb.exe are the common file names to indicate the Datanamic SchemaDiff MultiDB installer.
From the developer:
Datanamic SchemaDiff MultiDB is a tool for comparison and synchronization of database schemas. It allows you to compare and synchronize tables, views, functions, sequences (generators), stored procedures, triggers and constraints between two databases. Multiple databases are supported.
You may want to check out more software, such as Datanamic MultiRun for MS SQL or DeZign for Databases, which might be similar to Datanamic SchemaDiff MultiDB.