Majestic - Majestic - Link intelligence tools for SEO and Internet PR and Marketing. Site Explorer shows inbound link and site summary data.
UI Garage - Specific mobile and web design patterns for your inspiration
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
Muzli - UI/UX and Design Inspiration Chrome Extension
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Design Hunt - Curated design inspiration for everyone