Casey Bisson

This is a convenience class and collection of methods to make creating new custom post types with their own metaboxes easy.
The general idea is to define a function that’s hooked to the <code>register_post_types</code> action. The function defines a class for your post type that extends the <code>GO_Cpt</code> class. This follows a design pattern established by the modern widgets API (as introduced in WP 2.8) https://codex.wordpress.org/Widgets_API#Developing_Widgets .
The result is a new custom post type and much easier creation and updating of custom meta associated with that post type. You’ll also have a convenient object you can use to access the metadata associated with each post.
<pre><code>function my_customposttype() { class My_CustomPostType extends GO_Cpt { function __construct() { // execute the parent constructor with the name 
 // and definition for the custom post type parent::__construct( $post_type_name , $post_type_definition ); } function metabox( $post , $meta ) { // print out the form here // 
 // this method is optional, only use it if you want to 
 // add a metabox to your custom post type } function update( $new_meta , $old_meta ) { // sanitize and validate the metadata // then return $meta so it can be saved // // this method is required if a 
 // metabox() method is included } } global $my_customposttype; $my_customposttype = new My_CustomPostType; } // hook that function to the register_post_types action add_action( 'register_post_types' , 'my_customposttype' ); </code></pre>
Backstory: defining the post type class inside the function avoids issues with loading order and fatal errors resulting from attempting to extend a class that might not exist yet. Isn’t PHP awesome?
See the included hello world example: https://plugins.trac.wordpress.org/browser/go-cptfactory/trunk/example-helloworld-cpt.php
To access the meta associated with a post, you can call <code>$my_customposttype->get_meta( $post_id );</code>
You can easily add a method and hook to filter <code>the_content</code> or <code>the_excerpt</code> to insert custom values that may have been entered in the post meta. Simply add <code>add_filter( 'the_content' , array( $this , 'the_content' ));</code> in the <code>__construct()</code> and then define another method in the <code>My_CustomPostType</code> class such as:`
<pre><code> function the_content( $content ) { 
 $meta_print = print_r( $this->get_meta( get_the_ID() ) , TRUE ); 
 return $meta_print . $content 
 } </code></pre>
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GigaOM Custom Post Type Factory

Makes defining custom post types as easy as creating a widget. Includes example code to get you started.

Sourav Mondal

In many projects and sites we need to built custom posts types and need to create custom taxonomy to implement the business logic properly. 
This plugins helps to create custom post types and Taxonomies and relate them without writing a single line of code. 
A beautiful Dashbaord Section Interface is provided to do the works.
Author Email: souravmondal10@gmail.com 
Author Website: http://souravmondal.co.in 
Features
<ul>
<li>Easy to Install.</li>
<li>very lightweight.</li>
<li>User friendly interface in admin panel. </li>
</ul>
Notes
*If you face any problem or find any bugs ,then please let me know.I will fix that.You cooperation is expected.

Plugin Name: Simplify Post Taxonomy

Use this plugin to create custom post types and custom taxonomy.Don't need to write codes any more.Pure WordPress standard followed.

GigaOM Custom Post Type Factory vs Plugin Name: Simplify Post Taxonomy