1C-Bitrix is a system of web project management, universal software for the creation, support and successful development of corporate websites and online stores.
Apache is a free and open-source cross-platform web server software.
Debian is a Linux software which is a free open-source software.
OpenSSL is a software library for applications that secure communications over computer networks against eavesdropping or need to identify the party at the other end.
PHP is a general-purpose scripting language used for web development.