QGIS (Quantum GIS) is a cross-platform free and open-source desktop geographic information system (GIS) application that supports viewing, editing, and analys…

PostGIS is an open source software program that adds support for geographic objects to the PostgreSQL object-relational database.

With Mapline you can easily create a map from Excel spreadsheet locations! Just paste your data to see a map within seconds.

ArcGIS is a geographic information system (GIS) for working with maps and geographic information.