Lotame - Make your data actionable, learn about your most valuable customers, improve ROI by targeting the right audience and increase relevance across screens.
Radius Networks - Radius Networks offers mobile proximity technologies.
Adobe Audience Manager - Adobe Audience Manager is a data management platform that integrates online and offline data to deliver a unified view of all your audiences
Uniqode - Uniqode: Revolutionizing QR Codes, Simplifying Solutions.
Google Audience Center - 3 votes and 6 comments so far on Reddit
AltBeacon - AltBeacon is an open and interoperable specification for proximity beacons.