Merge pull request #10070 from philips/add-more-projects

Please read https://github.com/etcd-io/etcd/blob/master/CONTRIBUTING.md#contribution-flow.

Documentation/integrations.md

@@ -171,3 +171,5 @@
 - [CoreDNS](https://github.com/coredns/coredns/tree/master/plugin/etcd) - CoreDNS is a DNS server that chains plugins, part of CNCF and Kubernetes
 - [Uber M3](https://github.com/m3db/m3) - M3: Uber’s Open Source, Large-scale Metrics Platform for Prometheus
 - [Rook](https://github.com/rook/rook) - Storage Orchestration for Kubernetes
+- [Patroni](https://github.com/zalando/patroni) - A template for PostgreSQL High Availability with ZooKeeper, etcd, or Consul
+- [Trillian](https://github.com/google/trillian) - Trillian implements a Merkle tree whose contents are served from a data storage layer, to allow scalability to extremely large trees.