I used citymapper on my trip through four countries in Europe a couple months ago and it was amazing for the transit systems and navigating me around. Especially useful in Paris and London’s subway and bus lines. I really liked the reminder notification it would send me when my stop was approaching, because I would get the notification on my Garmin watch.

Other than that, openvpn client back to my home router in the US when I was on public Wi-Fi.

Google translate for real time image translation and quick reference to ensure I remembered the right word in French or German properly.