Vacuum Data - Instant access to all* open data from a single place
Dataset Search - Making it easier to discover datasets. Made by Google.
Mapsense - The API for data-driven mapping
Kaggle Datasets - Share, collaborate on, and analyze open data
OpenStreetMap - OpenStreetMap is a map of the world, created by people like you and free to use under an open license.
Tunzal - Tunneling solution to expose local endpoint at minimum cost.