camelcamelcamel

Enter any two places on Earth and see every way to travel between them — flights, trains, buses, ferries, driving — with estimated costs, durations and booking links. Free.

Live map of global air traffic: click any aircraft for route, altitude, speed and aircraft details, or replay past flights. Free tier covers real-time tracking with ads.

Collaborative trip planner: build day-by-day itineraries on a map with friends, import reservations from email, track budgets and export offline. Free core planning features cover full itineraries on web and mobile, before and during the trip.

The free, editable map of the world built by millions of contributors — the open-data foundation behind countless apps, with browsable maps and community editing tools on the site itself.

Gear list builder for backpackers and travelers: itemize your pack with weights, visualize base weight in charts, and share the list publicly. Free and open source — a hiking community standard.

Crowd-sourced atlas of the world's hidden wonders — obscure museums, strange monuments, natural oddities — with detailed entries and maps for building unusual itineraries. Free to explore.