Webmaster Tools, Developer Tools, Programming Tools. There are a lot useful tools here.

• Base64 Encoding
• Browser Settings
• CSS Coder
• CSS Navigation Menu
• Datetime Converter
• DHTML Tooltip
• Dig Utility
• DNS Utility
• Dropdown Menu
• Fetch Content
• Fetch Header
• Floating Layer
• htaccess Generator
• HTML to PHP
• HTML Encoder
• HTML Entities
• IP Convert
• Meta Tags
• Password Encryption
• Password Strength
• Pattern Extractor
• Ping Utility
• Pop-Up Window
• Regex Extractor
• Regex Match
• Scrollbar Color
• Source Viewer
• Syntax Highlighting
• URL Encoding
• Web Safe Colors