1 CSS Modules

Several developers have created CSS modules (e.g., for styling tables, GUI widgets, etc...) that can be used in a wide variety of projects, including:

2 CSS Static Analysis Tools

Several static analysis tools for CSS exist, including:

3 Fonts

There are a number of fonts available for use by HTML/CSS developers. Some fonts use Scalable Vector Graphics (SVG), including:

4 Integrated Development Environments

There are some very good free Integrated Development Environments (IDEs) available, including:

5 Verifiers

There are standard verifiers available for both HTML and CSS.