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.

Avira Free Antivirus

 Avira Free Antivirus



Avira Free Antivirus is a very popular free antivirus with solid protection. Avira quite often wins first places in various tests and receives awards.
Main features of Avira Free Antivirus:
Virus scanner (protection against ransomware, viruses, trojans, etc.);
Treatment and blocking of infected files;
Blocking potentially unwanted programs.
The disadvantages include the fact that it has a not entirely clear interface and therefore not very convenient, as well as the fact that it uses advertising more and more actively than others and imposes its products.
Official page - https://www.avira.com/en/free-antivirus-windows