I think that labor and time should be invested in technologies, not products. Therefore, my personal development is based Open Source technologies.
Symfony, OOP, ORM
Projects with Symfony, Doctrine and Twig and code-base that conforms to PSR standards.
GNU/Linux, Bash, AWS
I use Debian and Arch based distributions on server and desktop platforms.
MariaDB as RDBMS; also MongoDB or Elasticsearch according to requirements.
Git, JIRA, Phabricator
I prefer Git as version control system and JIRA or Phabricator as collaboration system.