Delphi. Most interesting communities.
It's important to collaborate with whole world Delphi professionals. Firemonekey is the best crossplatform library and we should popularize it.
Telegram groups and channels:
- Delphitech: https://telegram.me/delphitech
- Delphi Developers: https://telegram.me/delphicode
- Fire-Monkey (Russian indy community): https://telegram.me/fire_monkey
- Delphi iOS & Android Developers G+: https://plus.google.com/b/102820202313664824882/communities/107332833200594894879
- Facebook group: https://www.facebook.com/groups/137012246341854/
- VK.Com group: https://vk.com/delphi_for_apple
If know another popular group, that people use FMX and other new Delphi and C++ Builder, wright down the comment.