It sounds like a blog platform but I don't know which blog platform supports rating. Independent blogs are separated, which is difficult for people to find, and we have no idea about the quality of the blog posts unless we read it.
I think it would be nice if there's a platform that people can share knowledge and experiences, where articles are rated and categorized so that useful articles can be easily found by others by searching.
If there are such web application, please tell me what type the web application is and list the most popular ones.
If there's no such thing, please analyze why it doesn't exist.