Product Hunt Launch OS - Product Hunt launch toolkit that looks like Product Hunt
Hunted Space - Insights on Product Hunt launches!
CapitalConnector - Access 70,000+ VCs, Angels, Mentors, Accelerators, and more
LaunchPedia - 200+ Tools & Resources for Your Next Product Hunt Launch
Indie Letters - Not a marketing but "growth" marketing newsletter for makers
CronTool - Cron expression editor & debugger