SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.

Optmyzr - Optmyzr AdWords Tools. Optimization Solutions, Quality Score Tracker, Landing Page Checker, and more. Free Trial Available.

Majestic - Majestic - Link intelligence tools for SEO and Internet PR and Marketing. Site Explorer shows inbound link and site summary data.

LiveIntent - LiveIntent is a web platform that offers effective e-mail advertising services for marketers and publishers.

Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.

Affise - Affise offers performance marketing solution to manage and analyze affiliates, advertisers, creatives, conversions, offers, and payments.