Webmaster Tools

At one of the recent conference sessions I attended, the presenters showed a long list of interesting open source tools for web workers. Here are a few:
Yahoo Design Pattern Library
Google Webmaster Tools
Firefox plugins like Linkify, Firebug, Link Checker
Open Source Web Design-- style sheets and design templates
MyBlogLog--analytics
Crazy Egg--get statistics, analytics, heat maps
gvisit--a visitor map based on statistics
Trailfire--create web tours

ManyEyes--creates data visualization, comparisons and correlations, cloud tags

• Tonight's bonus round: What's My IP?