Moz.com – A source for fantastic SEO software, tools, and resources.
Keywordtool.io – A fantastic keyword tool for long string keywords.
Google Keyword Planner – Google’s own keyword planning software to track search volume and related keywords.
Google Mobile-Friendly Test – Google’s own mobile usability test and suggestions.
Google Pagespeed Insights – Google’s own sitespeed test.
Google Analytics – Google’s own analytical software for all your website data insights.
Google Search Console – Google’s own webmaster console for site health and updates.
Bing Webmaster Tools – Bing’s own webmaster console for site health and updates.
Copyscape.com – A tool to identify duplicate content across the internet of your website.
SimiliarWeb.com – Compare your website to your competitors in terms of traffic, and more.
Lucidcharts.com – A fantastic tool to quickly establish your websites UX and architecture.
CloudFlare – A fantastic CDN option for faster sitespeed.
BrowserStack.com – A tool for responsive testing and mobile usability.