Sygic Travel Maps - Itinerary planner for independent travelers
DoNotPay Travel - Get paid when the price drops on flights & hotels. 100% Free
TRAVO - Instantly create end-to-end trips around your events.
Kiwi.com - Find and book the best low-cost flights all around the world
Tripsy - Planning your trip has gotten much easier.
FlyGRN - Flight search engine that offsets carbon emissions for free