LincSphere is a cloud-based contact management software for business networking providing all the tools one needs to be successful and effective networkers, whether doing it face to face or online. LincSphere is a great professional networking tool that allows you to follow up, make introductions, and send referrals to build strong relationships. LincSphere also brings in analytics to give you better insight to your relationships.  A free version is available. The priced plans start at  $4.99 per month.