IndiePage - All your startups, on a page
Product Hunt Launch OS - Product Hunt launch toolkit that looks like Product Hunt
First 100 Users - Get your startup's first 100 users.
CapitalConnector - Access 70,000+ VCs, Angels, Mentors, Accelerators, and more
TopStartups.io - Backed by investors like Sequoia, A16Z, Benchmark. See the fastest growing startups in one place.
Indie Letters - Not a marketing but "growth" marketing newsletter for makers