Sometimes Sizzle + CSS level 3's attribute selector logic isn't enough. Sometime you want to be able to do a RegExp search of attribute names, other times you don't know what the attribute name is but have some inkling as to the value. Not recommended for production (this is a performance-intensive anti-pattern) — this was written to help debug …

jquery.attributeMatch.js

// Accessible from $ (whole document scope) or on $.fn (search with jQuery scope)
// Usage:
// attributeMatch( name, value, returnAttributes )
//
// Where @name and @value are RegExps or RegExps-as-strings to match against attributes names and values.
// @returnAttributes returns the attributes themselves rather than the owner element - useful to avoid repeating yourself
// eg: $.attributeMatch( /^lang$/, null, true )[ 0 ].value;
//
// To return all elements with ARIA attributes:
// $.attributeMatch( '^aria-\w+' );
//
// To filter current set of attributes whose value contains the word 'off', and return those attributes:
// $( ':input' ).attributeMatch( null, /\boff\b/, true );
void function configAttributeMatch(){
	$.attributeMatch = $.fn.attributeMatch = function getElementsMatchingAttributes( name, value, returnAttributes ){
		var attributes = getAttributes.apply( this, _.toArray( arguments ) );

		return returnAttributes ? attributes : getOwnerElements( attributes );
	};

	function getAttributes( name, value ){
		var scope         = ( this instanceof jQuery ? this : $( '*' ) ).get();
		var properties    = {};

		if( name )  properties.name  = name;
		if( value ) properties.value = value;

		var attributeList = _( scope )
			.pluck( 'attributes' )
			.map( function iterateAttributeLists( attributes ){
				return _.filter( attributes, function doesAttributeMatch( attribute ){
					return _.every( properties, function testProperty( expression, property ){
						return !expression || ( new RegExp( expression ) ).test( attribute[ property ] );
					} );
				} );
			} )
			.reject( function( x ){ return _.isEmpty( x ); } )
			.flatten()
			.valueOf();

		return attributeList;
	}

	function getOwnerElements( attributeList ){
		return $( _.pluck( attributeList, 'ownerElement' ) );
	}
}();