I'm in need of a functional OleDB data provider for PostgreSQL. It should be similar to the ODBC provider for MySQL. See http://dev.mysql.com/downloads/connector/odbc/5.1.html
The postgres software catalog has some providers on there.
dotConnect for PostgreSQL (from Devart) offers a pretty good one.  It is fast and works.  The free version will give you your basic ADO.net support, the pay offers everything else.  ODBC doesn't have a free version. 
http://www.devart.com/dotconnect/postgresql/   
edit 
Adding the direct link to the ODBC connector as it is on a separate page. 
https://www.devart.com/odbc/postgresql/
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