Leaflet is a modern, lightweight BSD-licensed JavaScript library for making tile-based interactive maps for both desktop and mobile web browsers, developed by CloudMade to form the core of its next generation JavaScript API.

Looks like a powerful CSS formatter that lets you determine the way you want your CSS to look. Looks worthwhile for a production or debugging scenario.

Excellent list of CSS hacks and snippets. Very useful.

Find the classes and IDs you no longer use. Neat tool.

A nicely done site with Lorem Ipsum done up in various HTML formats. Very useful.

When creating a web form, one of the many choices you must make is how you are going to align your labels with your inputs. This is not a trivial decision, as this placement affects the readability/usability of your form, completion rates, speed of completion, and ultimately the satisfaction level of the users trying to get through your form.