P. Chandra

Automatically adds a META keywords tags with keywords within the html HEAD tags. The categories are used as keywords. 
Note: Works on single posts only as they are assigned categories.

Quick META Keywords

Automatically adds a META keywords tags with keywords within the html HEAD tags. The categories are used as keywords.

DaganLev

huntlyc

Allows you to set global meta tags and customize on each individual page/post.
The plugin will generate the blog title and page title as default title tags if not specified otherwise.

Simple Meta Tags

Allows you to set global meta tags and customize on each individual page/post. Please Note: Does not support custom post types

Quick META Keywords vs Simple Meta Tags