I have blogged here for over 7 years without plugins. Specifically which plugin are you on about. Eaxctly what does it do? We may have a widget or a workaround you can use.
Also given the fact you did not appear to know the differences between WordPress.com and WordPress.org, it takes some gall to copy and paste the information in the support documentation on differences between WordPress.com and WordPress.org and try to pass that off as a blog post.