Devart ODBC Drivers - Reliable and simple to use data connectors for ODBC data sources. Compatible with multiple third-party tools.
SQLAPI++ - SQLAPI++ is C++ library for accessing SQL databases (Oracle, SQL Server, Sybase, DB2, InterBase, SQLBase, Informix, MySQL, Postgre, ODBC, SQLite, SQL Anywhere).
SimbaEngine X - ODBC & JDBC Driver Development Environment
CppDB - SQL Connectivity Library - CppDB is an SQL connectivity library that is designed to provide platform and Database independent connectivity API similarly to what JDBC, ODBC and other connectivity libraries do. http://cppcms.com/sql/cppdb/
CData ADO.NET Providers - A Powerful Way to Connect Your .NET Applications.
dotConnect - Ultimate solution for developing data-related .NET applications