This document summarizes Qwikker, a proximity marketing system that distributes mobile content through Wi-Fi and Bluetooth hotspots. It can be used for out-of-home advertising, events, retail, and campaigns. Content like apps, music, videos and coupons are delivered to mobile devices for free. The system includes on-location devices, a content management system, and remote management tools. Examples are given of campaigns run by brands like Diesel, Coca-Cola, and Ford that used Qwikker hotspots to deliver content like wallpapers, ringtones and apps to drive awareness and purchases.