Web designers use a variety of different tools depending on what part of the production process they are involved in. These tools are updated over time by newer standards and software but the principles behind them remain the same. Web graphic designers use vector and raster graphics packages for creating web formatted imagery or design prototypes. Technologies used for creating websites include standardised mark up which could be hand coded or generated by WYSIWYG editing software. There is also proprietary software based on plug-ins that bypasses the client’s browsers version, these are often WYSIWYG but with the option of using the software’s scripting language. Search engine optimisation tools may be used to check search engine ranking and suggest improvements.
Other tools web designers might use include mark up and other testing tools for usability and accessibility to ensure their web sites meet web accessibility guidelines.
courtesy to : wikipedia