SEO and URL Analysis and Planning Tools

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KnowEm

KnowEm allows you to check for the use of your brand, product, personal name or username instantly on over 500 popular and emerging social media websites. Grab your name and secure your brand before someone else does. Check out Linchpinseo KnowEm profile
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W3.org

Check the markup (HTML, XHTML, …) of Web documents
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Domain Superstar

Domain Superstar is dedicated to providing super premium domain tools for domainers, webmasters, Internet marketers, and anyone simply looking to find a great domain name. Our goal is to help everyone find great domain names and then turn those domain names into profitable money making assets. Read our pricing page for more information about our services.
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Snippet Optimization Tool

This tool simulates Google’s search engine results pages (SERPs). Use the form below to enter the title, meta description, and URL of your web page, and this tool will generate a virtual search result listing based on your input.
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htaccess Editor

Click and drag way to create a htaccess file for your website
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SEMRush

Tool for Google organic and AdWords competitors keywords research
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Rank Traffic Calculator

SERP Rank Traffic Calculator with spreadsheet to help determine ranking traffic value
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Google Insights

With Google Insights for Search, you can compare search volume patterns across specific regions, categories, time frames and properties.
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XML Sitemaps

Create an XML sitemap that can be submitted to Google, Bing, Yahoo and other search engines to help them crawl your website better. Create a Text sitemap to have a plain list of all your pages. Create a ROR sitemap, which is an independant XML format for any search engine. Generate an HTML site map to allow human visitors to easily navigate on your site.
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Web Site Optimization

Free Website Performance Tool and Web Page Speed Analysis
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Redirect Check

The redirect check tool looks at a number of different URLs for your homepage, and reports back on the response code given by each. To be completely safe, a 200 response should only be returned by one page. Other pages should return a 404 or 301. Anything else could be a potential duplicate content problem.
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Split Tester

If you’ve got two ads that have different click-through rates right now,how sure can you be that those ads will perform differently in the long run? Enter your clicks and CTR’s for each ad in the spaces below, and SplitTester will tell how how likely they are to have different long-term results.
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Lynx Viewer

The Lynx Viewer allows webmasters to see what their pages will look like when viewed with Lynx , a text-mode web browser. It is also presumably, how search engines see your site. In addition to that, it can help determine if web pages are accessible to the vision impaired.
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Copy Scape

Copyscape provides a free plagiarism checker for finding copies of your web pages online, as well as two more powerful professional solutions for preventing content theft and content fraud:
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Pingdom

The Full Page Test loads a complete HTML page including all objects (images, CSS, JavaScripts, RSS, Flash and frames/iframes). It mimics the way a page is loaded in a web browser.

The load time of all objects is shown visually with time bars.

You can view the list of objects either in load order or as a hierarchy. The hierarchy view allows you to see which objects are linked to in for example a CSS file.

Every test also shows general statistics about the loaded page such as the total number of objects, total load time, and size including all objects.
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Header Response Checker

This tool will help you to detect the exact headers that a specific URL generates. In Search Engine Optimization this can be especially important for directory listings that use a “jump” URL or redirect cgi to track the number of people who click on a listing.
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Xinu Returns

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