GRASS GIS - Geographic Resources Analysis Support System

•    C++

Geographic Resources Analysis Support System, commonly referred to as GRASS GIS, is a Geographic Information System (GIS) used for data management, image processing, graphics production, spatial modelling, and visualization of many types of data. GRASS supports raster and vector data in two and three dimensions. The vector data model is topological, meaning that areas are defined by boundaries and centroids; boundaries cannot overlap within a single layer.

QGIS - Geographical Information System (GIS)

•    C++

QGIS is an Open Source Geographic Information System. QGIS aims to be an easy to use GIS, providing common functions and features. The initial goal was to provide a GIS data viewer. QGIS has reached that point in its evolution and is being used by many for their daily GIS data viewing and editing needs. QGIS supports a number of raster and vector data formats, with new support easily added using the plugin architecture.

Whitebox Geospatial Analysis Tools - An open-source GIS and remote sensing package

•    Java

Whitebox GAT is an open-source geographical information system (GIS) and remote sensing package. The Whitebox GAT project began in 2009 and was conceived as a replacement for the Terrain Analysis System (TAS). Whitebox GAT is intended to provide a platform for advanced geospatial data analysis with applications in both environmental research and the geomatics industry more broadly.

SAGA GIS - System for Automated Geoscientific Analyses

•    C++

SAGA is a free geographic information system (GIS), with a special 'Application Programming Interface' (API) for geographic data processing. This API makes it easy to implement new algorithms. The SAGA API supports grid data, vector data, and tables. It has been designed for an easy and effective implementation of spatial algorithms.

MapWindow 6 Desktop GIS

MapWindow 6 Alpha Desktop GIS is a lightweight open source geographic information system (GIS) built using C# and the open source DotSpatial library (see DotSpatial on CodePlex.com). MapWindow 6 Alpha Desktop GIS is intended to be a complete implementation of DotSpatial and su...

HydroDesktop - Hydrologic Information System Desktop Application

•    CSharp

HydroDesktop is a free and open source GIS enabled desktop application that helps you search for, download, visualize, and analyze hydrologic and climate data registered with the CUAHSI Hydrologic Information System.

Creating-maps-in-R - Introductory tutorial on graphical display of geographical information in R.

•    TeX

This tutorial is an introduction to visualising and analysing spatial data in R based on the sp class system. For a guide to the more recent sf package check out Chapter 2 of the in-development book Geocomputation with R, the source code of which can be found at github.com/Robinlovelace/geocompr. Although sf supersedes sp in many ways, there is still merit in learning the content in this tutorial, which teaches principles that will be useful regardless of software. Specifically this tutorial focusses on map-making with R's 'base' graphics and various dedicated map-making packages for R including tmap and leaflet. It aims to teach the basics of using R as a fast, user-friendly and extremely powerful command-line Geographic Information System (GIS).

JS-GIS

•    Javascript

JS-GIS (JavaScript Static Geographic Information System) is a client-side technology for viewing statically-published geographic data on a web browser. It consists of a JS API for writing data browsers, and documentation for writing JS-GIS publishers.

Quantum GIS

•    C++

NOTE - All project resources are now hosted at http://qgis.org. Quantum GIS (QGIS) is a Geographic Information System (GIS). QGIS supports common vector and raster formats, including Shapefiles, PostGIS, GRASS, GeoTiff, TIFF, JPG, and many more.

Bing Maps Android SDK

The Bing Maps Android SDK is a base project that can be used to help developers create mapping applications using Microsoft's Bing Maps. This is written in Java and built using the Bing Maps AJAX v7 control.

Proj.Net

A .NET 2.0 library that performs coordinate conversions between various geodetic coordinate systems for use in fx. Geographic Information Systems (GIS) or GPS applications. Support include: - Datum transformations - Geographic, Geocentric, and Projected coordinate systems - Comp

MvcMaps - Unified Bing/Google Mapping API for ASP.NET MVC

•    Javascript

A single unified API for both Bing Maps and Google Maps JavaScript development within ASP.NET MVC.

KGIS

•    C++

KGIS it is a GIS aplication for KDE. (Geografic Information System) With a GIS aplication, it is possible to manipulate maps. The objective of KGIS is be the base for the development of GIS applications in KDE.

GMap.NET - Great Maps for Windows Forms & Presentation

GMap.NET is great and Powerful, Free, cross platform, open source .NET control. Enable use routing, geocoding and maps from Google, Yahoo!, Bing, OpenStreetMap, ArcGIS, Pergo, SigPac, Yandex, Mapy.cz in Windows Forms & Presentation, supports caching and runs on windows mobile!

VR GIS

•    Delphi

Vector Raster Geographic Information Synthesis. Incorporates Vector: Vector processing, Image processing, Digital Elevation Model DEM processing. These data can be combined to be viewed in 3D. Multitude of system organization aids.

TerraLook

•    Python

TerraLook provides access to satellite images for users that lack prior experience with remote sensing or Geographic Information System (GIS) technology by combining collections of images with a set of simple visualization and analysis tools.

Freeplane - Mind mapping tool

•    Java

Freeplane is a free and open source software application that supports thinking, sharing information and getting things done at work, in school and at home. The software can be used for mind mapping and analyzing the information contained in mind maps. Freeplane runs on any operating system that has a current version of Java installed. It can be run locally or portably from removable storage like a USB drive.

OpenStreetMap - The Free Wiki World Map

•    PHP

OpenStreetMap is a free editable map of the whole world. It allows you to view, edit and use geographical data in a collaborative way from anywhere on Earth. It is a wikipedia for maps. It is the project that creates and provides free geographic data and mapping to anyone who wants it.

Gix Export Tool

This extension helps GIS developers to migrate ESRI ArcView projects to the most popular Free and Open Source alternatives for Geographic Information Systems (GIS), like Mapserver, JUMP, ArcExplorer, QGIS and Thuban.

Bing Maps Showcase

•    Javascript

This is a community showcase of sample Bing Maps for Enterprise implementations, with articles and links to additional resources.