At Blue Medora we still have a very popular plugin for Oracle Enterprise Manager to monitor Postgres databases. With the number of customers moving to Postgres or supporting dual database environments on the rise, it is important to give the DBA the opportunity to keep monitoring his environment from his existing monitoring platform. The plugin integrates in the OEM dashboards and gives you a lot of details on Postgres.
Last year we upgraded the software to support Postgres databases running on AWS RDS, now at the request of several customers we upgraded to support postgres v10. We also have trial versions available now!