Website Tools

GoTOMyPC - GoToMyPC is the fast, easy and secure way to access your PC from any Web browser or wireless device in real time.You can access files, programs, email and network, travel anywhere and your PC remotely. They offer a 30 days trial period.
Google Ads Keyword Selector Tool - Generates potential keywords for your ad campaign and reports their Google statistics, including search performance and seasonal trends.
GKW - Good Keywords - Download Program - Free Windows software tool from Softnik Technologies for finding the ideal set of keywords for targeting your web pages. Use Good Keywords to find suitable keywords sets, create your meta tags, brainstorm product ideas, etc. Uses Data from Yahoo and Ask.
Yahoo and Wordtracker Keyword Tool - From 123promotion - Gives a different take on these tools by country.
Check Keyword Traffic - From BruceClay.com - This tool will produce an estimate of daily search activity for a specific keyword phrase on the internet across the major search engines.
Keyword Typo Generator - From SEOtools - Generate a list of suggestions for likely human misspellings and typos for given keyword.
Google Multiple Datacenter Keyword Rank Checker - This tool will perform a search across multiple datacenters, and check where your site may be ranking in each of them. This tool differs from others of it's kind in that instead of searching by IP address, it uses the actual domain name associated with that IP, simulating what someone would actually see when going to google.com and hitting that datacenter.
Wordtracker Keyword Tool - Find the top 100 related keywords - U.S. Slant.
Yahoo Multiple Keyword Rank Checker - Check a sites ranking in Yahoo! for up to 5 different phrases at once. Searches are cached, and a new search for a given keyword will only be performed once every 24 hours.
Advanced Google Searches - Use this tool to search google in many special ways. A useful resource for search engine optimisation (especially keyword research) among other things.
Website SEO Health Check Tool - . The tool reviews a site's title tags, descriptions, URLs, and page status codes. It then returns problems the site may have with missing title tags and descriptions, any duplicate title tags or descriptions, www versus non-www issues, index page health, and error handling issues. Aaron plans on adding more features to the tool.
Fagan Finder's URL Info - Superb tool for handling web pages: finding information about it, translating it, finding related pages, links, whois, etc. Allows multiple windows so you don't have to type in url for different data.
CodeFlux - Internet Tools - Some really neat tools here - finger, nslookup, whois, ssl, traceroute, ping, dig, validate www pages, w3c and ietf standards, tidy www pages, encoder, etc.
Duplicate Content Checker - Ideal for checking if your pages are going to be marked as duplicate content.
SEOmoz Page Strength Tool - The Relative Importance and Visibility of a Web page - The Potential Strength and Ability of a Page to Rank in the Search Engines and Data on Popularity, Links & Mentions of the Page Across the Web.