The official source of information on Managed Providers, DataSet & Entity Framework from Microsoft
I always enjoy making announcements regarding external providers releasing their Entity Framework-enabled ADO.NET providers.
It is my pleasure to announce that Npgsql has released a version 2.0 of their ADO.NET provider for PostgreSQL, which includes support for the Entity Framework. For more information, see the following announcement on the PgFoundry web site:
Congratulations to Josh Cooley and everyone else on the Npgsql team who contributed to the release!
ADO.NET Program Manager