SendX.io - SendX (https://sendx.io) provides remarketing and retargeting tools for web businesses. You can use popups, landing pages, email, web push notification, automation workflows and FB / Google retargeting to drive more revenue.
GrowthList - A crowd-sourced list of growth hacks
ReferralHero - Powerful referral marketing platform for honest marketers.
GrowthHackList - 100+ curated growth hacks for makers + early stage startups
Growth Hack World - Together We Rise
AppVirality - World's #1 referral marketing software that helps you design, manage, and optimize successful customer referral campaigns.