This document provides an overview of presentations given at a London hack day event. It describes several travel-related applications and APIs that were demonstrated, including: - An application called "Worldreviewer" that provides travel inspiration and recommendations based on criteria like budget and interests. - The Tripbod API, which was created to make it easier to build applications using Tripbod travel data by adding location awareness and filtering capabilities. Demo applications using this API were shown. - An application called "Travoloon" that was demonstrated by EddMcArdle and Riaan van Schoor. - The "geo.me" service from Stuart Grant, which utilizes various location data sources and APIs to