Grow my SaaS - Database of 150+ growth and conversion strategies
Feather Attribution - A free and tiny javascript library to track UTM tags, ref and referrer data client side so you can store these in your own database.
Growth Hack World - Together We Rise
LoyalAs - Get and track referrals automatically.
GrowthHackList - 100+ curated growth hacks for makers + early stage startups
ToneDen Lasso - Put fan and customer acquisition on autopilot