Ambassador - Referral Automation, Made Simple.
Dealflow by Micro Acquisitions - Automate your small business acquisition pipeline
Friendbuy - Customer referral program software and email opt ins for ecommerce.
Aboardly - IFTTT for automated customer emailing
Referral Candy - Run a fully automated, customizable and easy to integrate referral program for ecommerce.
Mobile User Acquisition Guide - Reach your loyal users with the best strategies