Majestic - Majestic - Link intelligence tools for SEO and Internet PR and Marketing. Site Explorer shows inbound link and site summary data.
DevDojo - Dev tools and resources for building awesome stuff
Moz - Backed by industry-leading data and the largest community of SEOs on the planet, Moz builds tools that make inbound marketing easy.
UXsniff - Track user behavior on your website and improve conversions with UXsniff: the user experience watchdog that looks out for you.
Brightedge - BrightEdge is the leading content performance marketing platform, helping more than 1,200 customers generate more organic traffic. BrightEdge is based in San Mateo, CA with offices in New York, Seattle, Chicago, Tokyo, Sydney, and London.
UX Recipe - Checklist to discover your next UX project tools/techniques