Google Analytics on your Dashboard Either you’re a web developer, blogger or anyone with a website, you probably use Google Analytics to collect and process crucial data about your site’s visitors. If you’re using OS X you will love this dashboard widget!

Tattler (app) is an open source topic monitoring tool for today's Web. Tattler finds and aggregates content from the Web on topics you ask it to monitor. Using semantic Web technologies, Tattler mines news, websites, blogs, multimedia sites, and other social media like Twitter, to find mentions of the issues most relevant to your organization.
Built and distributed on open source Drupal, Tattler's unique workflow and a toolset of intelligent content processors allow users to easily filter, organize, share, and take action on content gathered from the Web.

Piwik is a downloadable, open source (GPL licensed) web analytics software program. It provides you with detailed reports on your website visitors: the search engines and keywords they used, the language they speak, your popular pages… and so much more.