According to their official website, the Russian antivirus vendor Agnitum has sold their antivirus and firewall products to Yandex, which decided to discontinue the security programs for consumers.
In December 2015 Yandex acquired Agnitum software technology. These technologies will now be used to protect users of Yandex Browser. As a result of the acquisition, Agnitum terminates direct and partner sales of the Outpost product line.
Agnitum will provide antivirus base updates, bug fixing and technical support until December 31, 2016.
http://www.agnitum.com/index.php
Agnitum's Firewall was considered the second best firewall in the world according to Top Ten Reviews:
http://personal-firewall-software-review.toptenreviews.com/
However, the Agnitum Outpost security suite landed on the 20th spot due to poor antivirus and anti-spyware results:
http://internet-security-suite-review.toptenreviews.com/