AdBull is free to use

AdBull, a proprietary division of Lexos Media, provides a contextual-based cursor advertising vehicle that allows content publishers of all sizes the ability to increase monetization up to 500% over other forms of contextual advertising; wi...

AdInsight Clarity offers both free and paid options

The system saves visitor information so it can report on every keyword that generates telephone enquiries. This way you are able to get complete accuracy with your call tracking and drive further improvements to your ROI