1caa4152_O_Company___ShiftWeb_Solutions__WordPress_com
[WordPress.org] All plugins allowed Just like the access you have with themes, you have full access to the thousands of plugins that have been created. Plugins can extend your site to do almost anything you can imagine. They can range from tools to remove functionality or it can add functionality. Again, if you are a developer, you can create your own plugins. [WordPress.com] 
No plugin upload Just like the limited access to themes, you have limited access to plugins. If you have an open mind and/or needs that you want to add to your website, you may find that you can not do so because of the limitations.
WordPress.org vs. WordPress.com | Atlanta Web Design & SEO Company | ShiftWeb Solutions
WordPress.com