Product's keywords are great SEO tools.

This extension generates meta keywords for products from relevant words in product and product's category titles.

Supports OpenCart Version 1.5.0 + (vqmod required).

No files will be overridden. Easy VQMOD install.

Existing keywords won't be deleted. Generated keywords will be appended to existing ones. >

This extension is included in Opencart SEO PACK. It contains 11+ extensions and you can save more than $40 by purchasing the full Opencart SEO PACK:

http://www.opencart.com/index.php?route=extension/extension/info&extension_id=4653

UPDATE:
Meta Keywords Generator v 2.0 has been released:
- You can parameterize your generated keywords
- Clear SEO is included for FREE
- SEO report is included for FREE

DEMO:
http://ocdemos.womgoo.com/admin
user:demo
pass:demo

This extension can be found in admin area Catalog -> SEO Pack.

*** This extension is not compatible with OC 2.x. The version for OC 2.x and OC 3.x is included in Opencart SEO Pack PRO which also includes all the other SEO related extensions and features.