CopyScape
http://www.plagspotter.com/
Google Webmaster Tools
Bing Webmaster Tools – Bing’s version of GWT. Analyze your website inside and out.
Structured Data Testing Tool
Image Analyzer
http://www.siteopsys.com/on-page-link-counter.tool
Shared Server Check
Similar Page Checker
W3 Validator
WayBack Machine
WordCounter
http://code.google.com/speed/tools.html
http://www.inspyder.com/free/DnsTool.aspx
- Google Analytics Site Speed measures page load time as experienced by your visitors and allows you to measure other user defined timings.
- PageSpeed Insights analyzes the content of your pages and provides suggestions to improve performance.
http://www.microdatagenerator.com/