Name:SEO Chat (Free)
URL:http://tools.seochat.com/category/online-webmaster-tools/
Utility:This free website provides following tools including – 

• Robots.txt validator
• Domain age checker 
• Browser settings
• Whats My IP
• Base64 encoding decoding 
• Code to text ratio
• URL encoding 
• Webpage size lookup
• Whois domain lookup
• DNS lookup tool
• Search engine friendly redirect checker 
• IP address converter 
• Domain name type generator 
• Free HTML validator tool 
• Website pattern tool
• Dig utility 
• HTTP header response status codes check tool 
• Whats my browser size tool 
• Ping test 
• HTML source code viewer 
• URL rewriting 
• Fetch HTML content 
• Regular expression pattern checker
• Analyze HTTP header tool