PostgreSQL is a very well known SQL database.
The driver pgsql is a 100% erlang implementation of the Postgres Frontend/Backend protocol.
Early development was committed to jungerl. This is the exact same codebase, except that I now use GIT and host the project at github.
The driver has been used by many people, but still needs to mature.
It was my first real Erlang project, and thus it is not an OTP application, nor is it very apt at being concurrent.
None. :(
The Erlang Public License, its similar to the Mozilla public license in terms. You should find it and read it if you’re worried about these things.