Open Data Inception - 2700+ Open data portals around the World
MapHub - Create interactive maps
OpenStreetMap - OpenStreetMap is a map of the world, created by people like you and free to use under an open license.
Carto - The future of GIS? It’s Spatial Data Science. CARTO is the world’s leading Location Intelligence platform for Data Scientists, Developers and Analysts in Enterprise.
API List - A collective list of APIs. Build something.
AppSheet - AppSheet enables users to create mobile apps instantly for both OS and Android.