Free online SEO and Webmaster tools by Cloxy Ltd.

• Check HTTP Headers Online Tool
• Unique Content Checker
• Onpage SEO Analysis Tool
• Online HTML Editor
• Simple Article/Text Spinner
• Hash Functions Online: md5, sha256 ...
• Keccak-256 Online Hash Generator
• Protect your content from stealing with CopyPoison
• Free Bitcoin TX Accelerator
• Bitcoin Transaction Check Status
• Free Uptime Monitoring Tool
• Mass URL Ping Tool
• Strike Out Nofollow Links: Chrome, Firefox, Opera

The tools are moving to 4tools.net