• automatic formatting of cross-references based on the type of object referred to (chapter, section, equation, theorem, etc.);
• full control and customisation of the reference format;
• cross-references and page references to multiple items;
• automatic (optional) sorting and compression of multiple cross-references or page references;
• optional output of a sed script that can strip out Cleveref commands and replace them with standard LaTeX, allowing Cleveref to be used e.g. in articles sent to journals or collaborators that don't (yet!) support Cleveref.

A number of other LaTeX packages provide similar features. Some are venerable enough to be documented in The LaTeX Companion, or even included in the standard LaTeX distribution itself. But all those that I've come across provide only a subset of the Cleveref features. (See the Introduction to the package documentation for some comparisons.)

There is no separate documentation; read the package source to find out what commands it provides.

• Quantum package

• Authord package
• Authord documentation