Google Analytics - Improve your website to increase conversions, improve the user experience, and make more money using Google Analytics. Measure, understand and quantify engagement on your site with customized and in-depth reports.

Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.

StatCounter - StatCounter is a simple but powerful real-time web analytics service that helps you track, analyse and understand your visitors so you can make good decisions to become more successful online.

Perfect Wiki - Build and organize your knowledge base of company resources without switching between workspaces

Histats - Start tracking your visitors in 1 minute!

Pages by Process Street - Pages is a free-for-everyone knowledge base from Process Street.Try it out!