ReferralHero - Powerful referral marketing platform for honest marketers.
Launchrock - Setup a viral "Launching Soon" page in minutes to attract potential customers and promote your site's launch.
Viral Loops - Viral Loops is a viral and referral marketing platform to launch ranking competitions, sweepstakes, pre-launch and referral programs.
Ambassador - Referral Automation, Made Simple.
KickoffLabs - Lead generating landing pages, opt-in forms, and launch pages for everyone. Get a Viral Boost with built-in referral & email marketing. Start FREE!
Friendbuy - Customer referral program software and email opt ins for ecommerce.