Broken Link Checker free
OpenLinkProfiler or OLP is a free backlink analysis tool that enables you to get a detailed overview of the backlink profile of any website for which other companies charge high fees:
- Get analysis of 200,000 freshest live back links.
- Download 100,000 links per website – free.
- No request limit (free account necessary for some features).
- Works with any website.
- Sort and filter the results to find particular links quickly and easily.
- Get email notifications when new links are discovered.
Majestic SEO provides a comprehensive backlink analysis with detailed information on the quality of your backlinks for SEO.
Woorank provides a comprehensive analysis of many SEO points including popularity on social media, Google ranking, and page rank in search engines with a step-by-step guide to improve your SEO.
Find out if a domain name is available – easy to use domain name checker at internetmasters.com
Network-Tools.com – Godaddy uses this tool to quickly & easily do a trace route; ping; domain name server (DNS) look up; WHOIS (find who owns a domain name); and more. If you just set up a new domain name or changed the DNS settings and are wondering if the DNS settings have been updated yet, just click the radio button for DNS Records and enter the name of the web site in the field below and click GO.
DNS Tool – checks the health and configuration of DNS settings. Provides DNS report and mail servers report. Provides suggestions to fix and improve DNS settings, with references to protocols’ official documentation.
SEOBook – Free & premium browser extensions, web-based tools and free SEO tutorials.
SeoTools for Excel (Free)
Browser size analysis tool – If you’re looking for Google’s original browser size analysis tool at http://browsersize.googlelabs.com to see what content is “above the fold” on your website page, this Google article explains where the browser size analysis tool is (now part of the In-Page Analytics report) and how to use it. By creating a visualization to quickly determine which portions of your page are visible to which percentages of visitors, this tool will help increase purchases by avoiding website visitors who may not see the button they need to click or increase readership and provide better website navigation.
Find your position / page rank for the Top 100 results in the Google, MSN & Yahoo search engines
Mobile App Tools
Countly shows you what users are doing inside your app with real-time data. You can customize your reports with your branding as well. Countly allows you 10 thousand free sessions per month.