Put a custom post type on your WordPress home page.

cpt-on-home.php

<?php
/*
Plugin Name: CPT On Home Page
Author: Christopher Davis
Author URI: http://christopherdavis.me
License: GPL2
*/

/**
 * Change this to be what you want to include on the home page.
 * 
 * eg define( 'CDUD_TYPE', 'your_post_type' );
 */
define( 'CDUD_TYPE', 'page' );

add_filter( 'parse_query', 'cd_wprirc1_parse_query' );
/**
 * Hook into parse query, which gets fired before posts are fetched. 
 * Check to see if we're on the home page AND if this is the main loop
 * before changing anything.
 * 
 * $query is passed in by reference (like a pointer in C), so you can 
 * change it in place. No need to "return" it.
 */
function cd_wprirc1_parse_query( $query )
{
    if( ! $query->is_main_query() ) return;
    if( is_home() || is_search() || is_tax() || is_category() || is_tag() || is_archive() ) {
        $query->query_vars['post_type'] = array( 'post', CDUD_TYPE );
    }
}