"The Data Browser Extension provides a table-based display for RDF data on the Semantic Web. Using AJAX code from the Tabulator Semantic Web Browser, the Data Browser Extension makes RDF data readable to the average person and shows how data are linked together across different sites. Queries can be generated for display in tables, calendars, maps, and timelines."
"YSlow analyzes web pages and tells you why they're slow based on the rules for high performance web sites. YSlow is a Firefox add-on integrated with the popular Firebug web development tool."
"CoScripter is a system for recording, automating, and sharing processes performed in a web browser such as printing photos online, requesting a vacation hold for postal mail, or checking flight arrival times. Instructions for processes are recorded and stored in easy-to-read text here on the CoScripter web site, so anyone can make use of them."
