libasr is a FREE asynchronous DNS resolver.

libasr runs on top of the OpenBSD operating system but also has a portable
version that can build and run on several systems, including:

* Linux
* FreeBSD
* NetBSD
* DragonFly
* MacOSX

This port packages the development snapshots released by OpenSMTPD team.

WWW: https://github.com/OpenSMTPD/libasr