A network daemon that runs on the Node.js platform and listens for statistics, like counters and timers, sent over UDP or TCP and sends aggregates to one or more pluggable backend services (e.g., Graphite).
curl statistics made simple.
Gain competitive insight into any website or domain name, compare and optimize businesses on the web using our comprehensive website dataset. Enter a domain name, an IP address, a keyword, an Adsense ID and see the website's traffic sources & technology, their online marketing strategies, the registration date, the location, server details, related websites, Alexa score, Google Pagerank, Pagespeed, MozRank and much more.
Mirador is a tool for visual exploration of complex datasets. It enables users to discover correlation patterns and derive new hypotheses from the data.
The HTTP Archive tracks how the Web is built.
Selfspy is a daemon for Unix/X11 and (thanks to @ljos!) Mac OS X, that continuously monitors and stores what you are doing on your computer. This way, you can get all sorts of nifty statistics and reminders on what you have been up to. It is inspired by the Quantified Self-movement and Stephen Wolfram's personal key logging.
Open Web Analytics (OWA) is open source web analytics software that you can use to track and analyze how people use your websites and applications. OWA is licensed under GPL and provides website owners and developers with easy ways to add web analytics to their sites using simple Javascript, PHP, or REST based APIs. OWA also comes with built-in support for tracking websites made with popular content management frameworks such as WordPress and MediaWiki.
ClickHeat is a visual heatmap of clicks on a HTML page, showing hot and cold click zones. ClickHeat is an OpenSource software, released under GPL licence, and free of charge.
Piwik is the leading open source web analytics platform that gives you valuable insights on your website's visitors, your marketing campaigns and much more, so you can optimize your online strategy and experience of your users.