SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
FlippingBook - FlippingBook changes the way you present your documents
Majestic - Majestic - Link intelligence tools for SEO and Internet PR and Marketing. Site Explorer shows inbound link and site summary data.
Scribd - Unlimited books, audiobooks & comics. Unparalleled discovery. Any device. $8.99/month
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
Flipsnack - Flipsnack | PDF to HTML5 flipbooks