"Show HN" is for things people have built themselves and that other people can "play with or try out." Basically Show HN is for things that are product-like and submitted by the person who made them.
Articles and blog posts aren't really in the spirit of Show HN except when they directly point to something that meets the criteria...for example a blog post about a new software framework that contains a link to the tool (and of course written and submitted* by a person responsible for making the tool).
Articles and blog posts aren't really in the spirit of Show HN except when they directly point to something that meets the criteria...for example a blog post about a new software framework that contains a link to the tool (and of course written and submitted* by a person responsible for making the tool).