06/06/2011

• Mind42 : Collaborative mind mapping in your browser
• YAML Builder : A tool for visual layout development of YAML based CSS layouts
• The W3C Markup Validation Service : This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc.
• Mindomo : Online mind mapping software
• YubNub.org : A social command line for the web