http://lognormal.com/blog/2012/08/13/analysing-performance-data/
Mirror of the same bluesmoon / lognormal blog post on analysing performance data.
http://www.speedawarenessmonth.com/analyzing-performance-data/
Blog post from bluesmoon / lognormal on how to analyse performance data. Includes some great points on geometric means and geometric standard deviation which better apply to lognormal distributions than arithmetic means / standard deviations. Very useful.
http://onlinestatbook.com/2/index.html
Useful online book on statistics. A work in progress, but looks very valuable.
https://www.sslshopper.com/ssl-checker.html
A very useful SSL check utility which will support non standard port numbers. Useful for monit debugging on port 2812.
http://cacti.net/
A web based tool to produce graphs based on data stored in RRDTool, usually used as a front end for data collected through systems like nagios.
