The Progress DataDirect Connect for ODBC driver for Microsoft SQL Azure delivers the best performance and scalability for applications connecting to Microsoft SQL Azure, Microsoft’s cloud-based relational database. One SQL Azure ODBC driver simultaneously supports SQL Azure 2000, 2005, and 2008. The Connect Platinum ODBC driver is available for UNIX and Linux platforms as well as Microsoft Windows and for 64 bit ODBC connectivity.
DataDirect's unique wire protocol SQL Azure ODBC driver eliminates the need to connect to the database through components on the database server. This single-tier architecture results in better response time and throughput and reduces the cost of deploying and maintaining applications.
Progress DataDirect (http://www.datadirect.com/)