Who makes LibreOffice? A worldwide community of volunteers and certified developers! We work mostly over the internet, but like to meet in person at hackfests to discuss ideas, implement features and have a great time together. Learn more: https://blog.documentfoundation.org/blog/2019/08/24/annual-report-2018-libreoffice-hackfests/
Fosstodon is a Mastodon instance that is open to anyone who is interested in technology; particularly free & open source software.