# What is Pgpool-II?
Pgpool-II is a tool to add useful features to PostgreSQL, including:
* connection pooling
* load balancing
* automatic fail over and more.
# Minor releases
Pgpool Global Development Group is pleased to announce the availability of following versions of Pgpool-II:
* 4.1.4
* 4.0.11
* 3.7.16
* 3.6.23
* 3.5.27
Release notes for versions prior 3.6 are no longer included in the source code.
Please take a look at [release notes](https://www.pgpool.net/docs/latest/en/html/release.html).
You can download [the source code and RPMs](https://pgpool.net/mediawiki/index.php/Downloads).