SiteAlyzer uncovers the 'technologies' used on websites. It detects content management systems, web shops, web servers, JavaScript frameworks, analytics tools and many more.

http://sitealyzer.pagodabox.com/

• Add/Update scan strings
• Add more techs (ex. css frameworks)
• Add SEO related info (title, meta tags values, etc.)
• Check for sitemap, robots, etc. (just use HEAD)
• Display target sites favicon
• Fast find for "g:" or "fb:" or any namespaced tag
• Detect servers using server fingerprints.
• Detect language based on url extension (php/aspx/pl/etc..)
• Detect using error page (non customized)
• Use better HTTP library.
• Use NoSQL db to store cached files.