These are a few of my favorite resources which have helped me in my travels…
WhatsApp – This is the preferred tool for hotels, guides, private transfers to communicate with you in Europe
GetYourGuide , Tripadvisor, Viator– Great for booking excursions, experiences and skip-the-line tickets
Expedia – I’ve used for booking short flights and stays
Booking.com – I’ve used it for booking accommodations
Trainline – Great for booking train tickets
Ferryhopper – Use for booking ferry tickets in Italy and other Mediterranean countries.
NS App and NS International App– The official train app for the Netherlands