Google Webmaster Tools provides you with detailed reports about your pages' visibility on Google.
GTmetrix is a free online tool that analyzes your page's speed performance.
StatusCake.com is a free website monitoring tool which allows users to track up to 10 websites and get alerted when their site is down or is having trouble.
DareBoost is an online tool to test, analyze and monitor your website: speed, SEO, quality, security. All you need for website optimization in a single service.
Performance monitoring simplified. Never let users see your website down or with bad loading speeds. Receive alerts & insights in real-time on health and performance.
Drive more visitors to your site using Bing data on search queries, crawling and search traffic.
WebToolHub.com is a dedicated portal for people looking for extensive webmaster and seo tools at one place at no cost.
Website monitoring service that offers a comprehensive free plan with:
World's largest marketing/webmaster community. Includes large collection of tools.
A curated collection of the best SEO tools, split into categories and collections.
Site Explorer allows you to explore all the web pages indexed by Yahoo! Search.
Uptime, Service Health and Performance Monitoring
Detecting end-user browser details, so web developers and customer service agents don't have to ask their clients about browser version, operating system, etc.
Use webapps or browse the web in a clean, distraction-free environment with VBWebApps.
This tool generates CSS gradient code using an easy to use graphical interface. It supports different options from simple linear to complex radial gradients.