http://bacnet.sourceforge.net

This BACnet library provides a BACnet application layer, network layer and media access (MAC) layer communications services for an embedded system.

http://bacpypes.sourceforge.net

This BACnet library provides a BACnet application layer and network layer written in Python for daemons, scripting, and graphical interfaces.

https://github.com/infiniteautomation/BACnet4J

A high-performance implementation of the BACnet I/P and MS/TP protocol written for Java (minimum version 1.5) by Serotonin Software. Supports all BACnet services and full message segregation. Can be used for field devices or for control platforms.

Virtually no documentation.

https://github.com/Frozenlock/bacure

A clojure library wrapping the BACnet4J. Built to provide a seamless Clojure experience.

Documentation : http://frozenlock.github.io/bacure/index.html

http://bacmon.sourceforge.net

BACnet LAN Monitor

The daemon listens for BACnet/IP traffic, classifies it, and can send alerts for some types of behavior. The web interface displays summary charts for the information it finds, grouped by the layers of the BACnet/IP stack. The daemon is based on the BACpypes library.

http://sourceforge.net/projects/yetanotherbacnetexplorer/

Small graphical explorer program written in c#, for browsing BACnet devices. Currently supports both BACnet IP + BACnet MSTP + BACnet PTP.

(See Wacnet)

https://hvac.io/docs/wacnet

HTML5 BACnet browser/webserver with various tools to debug and logs networks. Features a live REPL to send commands on the network.

Does not require an installation.

Built with bacure.

The BACnet Firewall Router (BTR) is an application that combines BACnet routing capability with traffic management functions to carefully control access to building automation and control networks.

http://sourceforge.net/projects/vts/

Visual Test Shell (VTS) is an application for testing the BACnet functionality of devices used in building automation systems.