Block Specific User-agents (Apache) Block specific User-agents' requests. Useful for dealing with malicious bots.
Rewrite URL as Query String Parameters (Apache) Convert URL structure to query string parameters. Use to create SEO friendly URLs.
Canonicalize Host – Add/Remove www (Apache) Canonicalize host names by either prepending www or explicitly omitting it from the domain name.
Dynamic robots.txt (Apache) Rewrite requests for robots.txt to a dynamic file which generates robot directives.
Reverse Proxy To Another Server (Apache) Proxy an intranet, or other, server's content through a different webserver.
Permanently Redirect Entire Directory (Apache) Redirect an entire directory to another location. Useful when restructuring a website.
Enforce Lower Case URLs (Apache) Force lowercase URLs, especially important for SEO on Windows-based servers, which are case-insensitive.