CLICKY

STAT COUNTER

PIWIK

GOING UP

MINT

REINVIORATE

FIRE STAT

WOOPRA

BLOG TRACKER

JAW STATS

The above listed free web analytics tools are great for non-commercial & personal sites. One can easily monitor the website metrics with one tool. But, if you are inquisitive and plan on monetizing your website and each visitor matters to you, go on, track them with atleast three tools. Each tool offers something different and utilizing a mix of these tools will offer great useful insights.
Currently, I am monitoring my website statistics with Google Analytics