Google Analytics!

Open Web Analytics - Web Analytics – Open Source Web Analytics Framework

Gaug.es for iPhone lets you check in on your stats on the go. View traffic, top content, and top referrers, even view live traffic as it comes in from across the globe with AirTraffic.

Digital marketing agencies and businesses use Whatagraph to save time and present analytics data in a way their clients and teams can easily understand.

AWStats is a free powerful and featureful tool that generates advanced web, streaming, ftp or mail server statistics, graphically. This log analyzer works as a CGI or from command line and shows you all possible information your log contains, in few graphical web pages. It uses a partial information file to be able to process large log files, often and quickly. It can analyze log files from all major server tools like Apache log files (NCSA combined/XLF/ELF log format or common/CLF log format), WebStar, IIS (W3C log format) and a lots of other software. »

Piwik PRO provides an analytics and tag management suite tailored to the individual needs of enterprise clients. What makes Piwik PRO unique is our commitment to data protection. Our main products are deployed in both on-premises and cloud versions, and each of them adheres to the strictest privacy and security regulations while ensuring our partners retain full data ownership.

Instant and retroactive analytics for web and iOS. Heap is an advanced yet user-friendly web and app analytics tool that lets you define custom events, track conversions and analyse funnels without needing to get IT involved.

Mixpanel is the most advanced analytics platform in the world for mobile & web. Stay up to date on trends, funnel conversion rates, and retention rates all in one app. All you need to do is login with your Mixpanel email address that you already use on the web.

The all-in-one platform for understanding and communicating with your customers online.

Woopra is the industry’s leading fully-integrated Journey Analytics platform that helps organizations to visualize, analyze and experience every touchpoint in the customer journey, empowering data-driven teams to grow and innovate substantially faster. Supporting collaboration across every department, Woopra’s approach to data is rooted in understanding the people behind the numbers.

Lucky Orange is a complete suite of tools for total website optimization and usability analysis. Using Lucky Orange, you can understand visitor behaviors, diagnose trouble areas in your conversion funnel, causes of abandonment & then evaluate your website optimizations to measure successes.

A free yet reliable invisible web tracker, highly configurable hit counter and real-time detailed web stats. Future rich free version with invisible tracking and real-time statistics.

Feedjit lets you see friends and visitors as they arrive on your blog or website. Know when your best friends read about your latest adventure. Be alerted when your most important clients view your latest product offering. Feedjit lets you know, right now, who is visiting your site. Simply add the Live Traffic Feed and instantly start seeing who is visiting your site as they arrive.

Metrica helps you get descriptive reports and record the actions of individual users, find out what people are searching for on your site,collect statistics, and keep track of conversion rates.