Targeted.io - Test your email designs across 30+ clients before you send'm
BetaList - BetaList provides an overview of upcoming internet startups. Discover and get early access to the future.
Really Good Emails - A large collection of good product email design.
Loot - Loot is a bank account ledger.
Stamplia - High converting and beautifully designed email templates
StartupBase - Community of makers & early adopters