NiceJob - Get more reviews and build an build an awesome reputation with NiceJob.
Referral Candy - Run a fully automated, customizable and easy to integrate referral program for ecommerce.
Open Loyalty - 100% customizable loyalty platform with ready to-use-features gamification and loyalty features. Available in Open Source and Enterprise edition.
Girafi - Get more from your website visitors. Referrals, feedback, e-mails & more.
Zoho CRM - Omnichannel CRM for Businesses of all sizes
UpViral - Referral marketing platform enables anyone in running effective and profitable viral marketing campaigns – in minutes.