www.textfixer.com/tools/

Online text tools for changing and modifying text and html code.

validator.w3.org

This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as ...

www.trishasdesignstudio.com/font-size-conversion-chart.asp

This small site has some very useful pages: Web-Safe Fonts, Font Sizes, Color Charts and HTML Lines.

• Web-Safe Fonts - This list the original Web-Safe Fonts and allows yo ...
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u-convert.com

Online lowercase and uppercase text converter, replace and sort text, strip HTML code

www.useragentstring.com

Understand what information is contained in a Firefox user agent string. Get an analysis of your or any other user agent string. Find lists of user agent strings from browsers, crawlers, spiders, bots, validators and others..

www.websnapr.com

websnapr lets you capture screenshots of (almost) any web page. Allow your visitors to instantly visualize any web page before clicking. Increase site traffic, click-through rate and site stickiness.

whatsmyuseragent.com

This website simply gives you your browser's user agent and some other session information like screen resolution. This site also has a 'Check Server Response / Status Codes' tool that displays the responsesand codes from the target server.

whatsmyip.org

Your IP Address plus Port Scanners, Traceroute, HTTP Compression Test, Ping, Whois, DNS, IP Geo Location, Password Generator and many more tools and how-to's. A useful tool is the Text Case Changer and also the FULL HTML Entities list.

www.yellowthemes.com

A theme search engine that covers all the major CMS and shops eg Prestashop and Joomla