wp-cond-scripts.php

<?php

function dequeue_scripts_on_condition() {
    // you can use various conditional tags
    // ex. is_page(), is_page_template()
	if ( ! is_page( /* page id */ ) )
		wp_dequeue_script( $handle );
	
	if ( ! is_page_template( /* page template name */ ) )
		wp_dequeue_script( $handle );
}
add_action( 'wp_enqueue_scripts', 'dequeue_scripts_on_condition' );

/**
 * For single handle
 */
function set_script_in_footer() {
	global $wp_scripts;
	$wp_scripts->add_data( $handle, 'group', 1 );
}
add_action( 'wp_enqueue_scripts', 'set_scripts_in_footer' );

/**
 * For multiple handle
 */
function set_scripts_in_footer() {
	global $wp_scripts;
	
	$handles = array(
		'handle-one',
		'handle-two',
		'handle-three'
	);

	foreach( $handles as $handle )
		$wp_scripts->add_data( $handle, 'group', 1 );
}
add_action( 'wp_enqueue_scripts', 'set_scripts_in_footer' );