MTStat - mod providing server status (number of players, average load, max_lag, memory usage) in JSON over http
You can use it with your monitoring system, host your own back-end instance that provide web page with interactive charts or use back-end that i host at http://mtstat.us.openode.io/ - ask in topic or PM me if you want your server monitored.
Depends: nothing, but it runs on Linux-based servers only.
Source: https://github.com/timdorohin/mtstat
Download: https://github.com/timdorohin/mtstat/archive/master.zip
Back-end source: https://github.com/timdorohin/mtstat-server
License: GPLv3
Requires adding to trusted mods and installed luasocket library!