Source Admin Tool

About

Alternative to HLSW.
Cross-Platform.

Features

RCon Support
Logging
Player info
Rules info
Server info

Third Party

miniUPnP: Used for port mapping on UPnP enabled devices (primarily miniupnpc).
libmaxminddb: Used for GeoIP.
This product includes GeoLite2 data created by MaxMind, available from http://www.maxmind.com.

References

Valve Developer Wiki

Thanks

psychonic