MongoDB

 MongoDB is an open source, document-based database management system that does not require a table schema description. MongoDB - classified as NoSQL and uses JSON-like documents and a database schema. If all four previous DBMSs are well known to most IT professionals, then few have heard of MongoDB. But she confidently takes the 5th line in almost all ratings. And as a result, in our ranking, she also occupies the 5th position.

Go, Ruby, R, Kotlin

 

As a bonus, I would like to note that along with SQL, on the 7th line of our rating, you can put such languages as: Go, Ruby, R and Kotlin, which are no less popular and in demand, and some continue to actively develop and gain popularity.