When I add an article on WordPress, it is automatically on the home page. Apparently, for hiding an article that is on the homepage, there is a software: WP Hide Post. On the dashboard, I can’t find this software. So can you help me please?
That does not exist an only WordPress.com blog. There is no FTP access and no blogger installed plugin capability on WordPress.com blogs. To hide a post you will have to either make it private or password protected. http://en.support.wordpress.com/posts/post-visibility/