The following scriptlets can be added to the favourites or bookmarks. They can be applied to any loaded page. Ready-to-use IE-favourites are available in a ZIP-archive.
One can pass the current URL to another site, e.g. the W3C online HTML validator:
Many pages use borderless tables for layout purposes.These can be made visible by adding red borders:
Current IE versions are able to apply image processing to html tags and entire pages.This script inverts all colors: