Enforce Lower Case URLs (Apache) Force lowercase URLs, especially important for SEO on Windows-based servers, which are case-insensitive.
Remove File Extensions From URLs (Apache) Simplify URLs slightly by removing file extensions. Used to tidy up URLs a bit, not to 'cloak the technology in use'.
Rewrite URL as Query String Parameters (Apache) Convert URL structure to query string parameters. Use to create SEO friendly URLs.
Add/Remove Trailing Slash (Apache) Add or remove the trailing slash in URLs to enforce consistent URL structure, good for SEO.
Serve Images from New Directory (Apache) Serve images from a new directory, whether by rewrite or redirect.