http://www.firstworks.com/sqlrelay.html

[линк]

SQL Relay is a persistent database connection pooling system for Unix and Linux supporting ODBC, Oracle, MySQL, mSQL, PostgreSQL, Sybase, MS SQL Server, DB2, Interbase, Lago and SQLite with C, C++, Perl, Python, Zope and PHP APIs, command line clients and a GUI configuration tool. It is ideal for speeding up database-driven web-based applications, accessing databases from unsupported platforms, migrating between databases, distributing access to replicated databases and throttling database access.