The MQTT client is written in Erlang and allows to connect to MQTT server and send/receive messages according to MQTT messaging protocol version 3.1.1
MySQL native client is written in Erlang and provides API that is very close to Connector/C library.
The goal of resource pool (rsrc_pool) Erlang library is reduce the overhead of creating new resources by reusing of the same resources among multiple processes.
The goal of ResourcePool (rsrc_pool_ex) Elixir library is reduce the overhead of creating new resources by reusing of the same resources among multiple processes.