What about the object system (symbol tables, globs, method calls, autoquoting in braces or before =>)? The different variables associated to the same name: scalar, array, hash, code, io, format (sure lisp has scalars and functions in different namespaces, but surely not so many types)? Lexical and dynamic localization in the same language? Function call without parentheses? Function call syntax depending on prototypes? Arrays and strings resizable efficently? Such simplicity of string operations that you still can't find in any other languge? These are all inventions of perl.
Also just show me a language with a reference-counting garbage-collector.
<code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>