@nikolay_siabrenko I'd love to know more apps as well! I just rely on Google for everything (traveling & attractions), and then Yelp for food. Another thing that really helps is seeing travel vlogs on the location on YouTube! It always gets me so excited for the place as well.
@nikolay_siabrenko I use Culture Trip to find ideas, Google Maps to add them to a list which I share with other people I'm traveling with. Hotel bookings and flights are automatically added to Google Calendar from Gmail. If it's a bit of a complex trip, I also create a shared Google Doc with the itinerary.