Piwik is an open-source web analytics platform that aims to be a direct competitor to Google Analytics, although as it exists, it’s not exactly a good replacement. The cool thing is anyone can develop plug-ins under the GPL license. You can customize your analytics interface based on your needs, by adding or removing plug-ins – this is where they are differentiating from Google Analytics.

Another differentiator is that you “own your own data,” meaning that Piwik is installed on your server and not hosted somewhere else. You can retrieve your statistics from using the open API, which publishes the data in all popular formats including JSON, XML and PHP. Piwik is available via a free download. Or, you can try out the online demo.