Articles Writing for Various Topics

I require 12 unique articles to be written for various topics. The articles will have to be around 500-600 words each and should ideally be broken down into 4-6 paras each. I'll be giving you the details of the websites for which the articles need to be written as well as the keywords that should be used while crafting the articles once the project is awarded. The tone of the articles should be informative/educational, but at the same time there should be subtle promotion of the site as well. So for e.g. If we talk about a certain feature or service in general, after stating the feature/service we also say that we have it in our offerings and why someone should opt to do business with us. Also, we'll be focusing on quality aspect so please only bid if you are sure you can deliver good quality articles which are not plagiarized.