gaxx

Automatically adds keywords and description meta tag on every page based on title, tags, categories, etc.
It works on the basis of defining some simple, tag-based rules for different page types (home, category, post etc).
Built on the foundations of the excellent Automated Keywords Generator by Julian Widya Perdana (http://mr.hokya.com/automated-keywords-generator)

Gaxx Keywords

Automatically adds keywords and description meta tag on every page based on rules that draw information from title, tags, categories etc

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

Gaxx Keywords vs Simple Meta Tags