Wireframe.cc - Sweet and simple online wireframing tool.
QGIS - QGIS is a desktop geographic information system, or GIS.
WireframeSketcher - WireframeSketcher is a wireframing tool for creating wireframes, mockups and prototypes for desktop, web and mobile apps. It's a desktop app for Mac, Windows and Linux, and a plug-in for any Eclipse IDE.
GeoServer - The reference implementation of the Open Geospatial Consortiums WFS and WMS services, GeoServer is...
Saola Animate - Easily create engaging HTML5 animations and interactive web content without coding skills
Mapbox - An open source mapping platform for custom designed maps. Our APIs and SDKs are the building blocks to integrate location into any mobile or web app.