Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
Email Inspire - Discover the best of email design and marketing — Browse email newsletters from top brands.
Majestic - Majestic - Link intelligence tools for SEO and Internet PR and Marketing. Site Explorer shows inbound link and site summary data.
EmailWay - Collection of the most insightful and informative email newsletters from across a wide spectrum of industries and interests
Ahrefs - Ahrefs is a toolset for SEO and marketing. We have tools for backlink research, organic traffic research, keyword research, content marketing & more. Give Ahrefs a try!
WhoSentWhat - We bring email newsletters from inbox to web