dexxaye

This plugin allows user to add additional columns to admin posts and pages page. 
Now supports custom post type

Custom Admin Columns

This plugin allows user to add additional columns to admin posts and pages page.

Elliott Richmond

Once installed this plugin will allow you to remove core columns from the list view of Posts, Pages and Users. Sometimes you might want to remove certain core columns from your WordPress install just to remove unwanted clutter.

Mondos Columns Manager

A simple plugin to remove columns from the WordPress list view.

Custom Admin Columns vs Mondos Columns Manager