Npgsql 

Npgsql is the open source .NET data provider for PostgreSQL.

PostgreSQL/Npgsql provider for Entity Framework Core.

PostgreSQL provider for Entity Framework 6

Json.NET plugin for Npgsql, allowing transparent serialization/deserialization of JSON objects directly to and from the database.

NodaTime plugin for Npgsql, allowing mapping of PostgreSQL date/time types to NodaTime types.

NodaTime support plugin for PostgreSQL/Npgsql Entity Framework Core provider.

NetTopologySuite plugin for Npgsql, allowing mapping of PostGIS geometry types to NetTopologySuite types.

NetTopologySuite PostGIS spatial support plugin for PostgreSQL/Npgsql Entity Framework Core provider.

PostGIS plugin for Npgsql, allowing mapping of PostGIS types to the legacy types (e.g. PostgisPoint).

GeoJSON plugin for Npgsql, allowing mapping of PostGIS geometry types to GeoJSON types.

PostGIS plugin for Npgsql, allowing raw byte access to PostGIS ypes.