Berlin is still the city to be in if you are interested in C++ and/or Qt. At least, if you are in Europe and don’t like the idea of flying across the ocean to go to CppCon.
The first conference will be in September, and it will join the KDE, Qt, VideoLAN and FSFE communities. It is a continuation of the Qt Dev Days and Qt World Summit for Europe, and it is called QtCon.
The second conference is becoming a true tradition, even for me, and it stays true to its original name – Meeting C++. It will be in November this time, which is a pitty since Berlin in December is filled with beautiful christmas markets which provided all the Meeting C++ participants great time last few years.