Zeitgeist for Mac OS X?

Does anyone know a application or project for Mac OS X like Zeitgeist for Ubuntu? > **What is Zeitgeist?** > > Zeitgeist is a service which logs the users’ activities and events, > anywhere from files opened to websites visited and conversations had. > > It makes this information readily available for other applications to > use. It is able to establish relationships between items based on > similarity and usage patterns. > > The service consists: > > - Engine > - Extensions > - API > - Dataproviders (Quote from http://zeitgeist-project.com )