Post Status Scheduler allows for scheduling of post status changes, category/tag adding or removing and 
removing of postmeta on any given date or time. It can be activated on any post type and shows 
up on the post edit screen in the publish section. From version 1.0.0 it has a feature for sending 
an email notification to the post author on the scheduled update.
<h4>Shortcodes</h4>
<ul>
<li>[pss_scheduled_time post_id=””] can be used to get the post’s scheduled date and time.</li>
</ul>
<h4>Filters</h4>
Scheduled Update: 
* post_status_scheduler_before_execution 
* post_status_scheduler_after_execution
Email Notification ( version 1.0.0 ): 
* post_status_scheduler_email_notification_recipient_email 
* post_status_scheduler_email_notification_subject 
* post_status_scheduler_email_notification_date 
* post_status_scheduler_email_notification_body

Post Status Scheduler

Change status, categories/tags or postmeta of any post type at a scheduled timestamp.

Phoenix Online

This easy-to-use plugin allows you to quickly and easily edit post meta values for almost any post type (including custom post types)
Edit post meta as plain text, in textareas, as light-weight HTML or using the full WordPress WYSIWYG editor!
From the first version, this has been designed for ease of use by site Contributors and Editors, but keeps settings reserved for Admin’s only. This gives site Adaministrators control over what less-privileged users can bulk edit.

Bulk Postmeta Editor

This plugin makes it easy to check and edit serialized data in a targeted and comfortable way. Both custom fields and hidden meta data can be easily queried by post type. The plugin then lists all data in an editable input field of your choice which makes comparing and editing the data a breeze.  


Very helpful for debugging

Allows you to bulk-edit post meta information (including custom post types) from a single place.

Post Status Scheduler vs Bulk Postmeta Editor