100 UI/UX Tips - This is a collection of Dos and Dont's for making your UI better.
Templates by Email Monster - Hundreds of free, responsive email templates. Pick and edit.
100 days of SEO - An actionable SEO tip to your inbox each day
SaaS Email Templates - Responsive HTML email templates for SaaS startups
UserInterface.io - Weekly UI/UX tips in your inbox for free
Email Template Generator - Email templates for your important relationships