Downloads for each DBAPI at the time of this writing are as follows:
* Supported Dialects
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- PostgreSQL: `psycopg2 <http://www.initd.org/tracker/psycopg/wiki/PsycopgTwo>`_ * `pg8000 <http://pybrary.net/pg8000/>`_
- PostgreSQL on Jython: `PostgreSQL JDBC Driver <http://jdbc.postgresql.org/>`_
- SQLite: `sqlite3 <http://www.python.org/doc/2.5.2/lib/module-sqlite3.html>`_ (included in Python 2.5 or greater) * `pysqlite <http://initd.org/tracker/pysqlite>`_
- MS-SQL on Jython: `jTDS JDBC Driver <http://jtds.sourceforge.net/>`_
* Experimental Dialects
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- MSAccess: `pyodbc <http://pyodbc.sourceforge.net/>`_
- Informix: `informixdb <http://informixdb.sourceforge.net/>`_
- Sybase: TODO
- MAXDB: `sapdb <http://www.sapdb.org/sapdbapi.html>`_
* Third Party Dialects
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- DB2/Informix IDS: `ibm-db <http://code.google.com/p/ibm-db/>`_
The SQLAlchemy Wiki contains a page of database notes, describing whatever quirks and behaviors have been observed. Its a good place to check for issues with specific databases. `Database Notes <http://www.sqlalchemy.org/trac/wiki/DatabaseNotes>`_