List of sites and codes where I can’t add anything to my blog, but can help yours.
Widget box
Iframe code- I couldn’t add the code in here so I turned the code into an image for you to see:
Postcast Plugin
Programming plugins
Plugins and widgets for wordpress Although these widgets are for wordpress, only some wordpress accounts actually allow you to add the widgets through your wp-contents folder which I don’t have!
Business Is Business
Business Is Business
WordPress.com dos not accept certain html code other than those listed in this page. Take note that wordpress.com also do not accept javascript.
As for the “wp-contents folder” you mention, it’s only for those who run the wordpress from their own hosted server, and not for wordpress.com.