The following is a growing list of free or open source mapping tools I’ve come across during my travels. If you find a broken link or know of additional tools please drop me a note. I hope you find this listing useful. Best wishes and happy mapping! Upload and download waypoints, routes, and tracks between your Windows computer and your Garmin, Magellan, or Lowrance GPS Viewer designed for use with various types of raster and vector based geospatial datasets, including data from photogrammetric, LiDAR, and IFSAR sources Translator library for raster geospatial data formats that is released under an X/MIT style Open Source license by the Open Source Geospatial Foundation Programming-free environment that allows users to quickly build applications for geocomputation and geographic visualization Not actually mapping software but a general purpose image manipulation program with capabilities similar to Photoshop and Corel PhotoPaint Java based mapping toolkit, it has the ability to read geographical data from a variety of data sources and display that information to the user Small application that displays a texture-mapped earth and lets you interactively explore it in 3D. It can also connect to a GPS unit and display in 3D all the info produced by the unit Comprehensive GIS software used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization Desktop GIS application designed for capturing, storing, handling, analyzing and deploying any kind of referenced geographic information Software suite to create, edit, compose, or convert bitmap images. It can read and write images in a variety of formats.’ Not actually mapping software but a general purpose vector graphics editor with capabilities similar to Illustrator and CorelDraw GUI-based application for viewing and processing spatial data. It includes many common spatial and GIS functions. It is also designed to be a highly extensible framework for developing and running custom spatial data processing applications. Software and client framework for spatial data infrastructures and can be used for a variety of different web mapping applications Software for creating plots of points, lines, polygons and labels to PostScript, Portable Document Format (PDF), Scalable Vector Graphics (SVG) format and web image output formats ‘Software suite is a comprehensive, production-grade Windows application designed to visualize, manage, process and analyze LiDAR point cloud data’ Software package for the processing and display of bathymetry and backscatter imagery data derived from multibeam, interferometry, and sidescan sonars Nunaliit framework aims to make it easy for anyone to build a cybercartographic atlas – telling stories and exploring the relationships between space, time, knowledge, and our senses Visualization framework that gives users the ability to apply advanced visualization and analysis techniques to their data Programmer’s toolkit allowing user to build applications and applets that access data from legacy databases and applications Paradise project: to design, implement, and evaluate a scalable, parallel geographic information system that is capable of storing and manipulating massive data sets Adds support for geographic objects to the PostgreSQL object-relational database. In effect, PostGIS ”spatially enables” the PostgreSQL server, allowing it to be used as a backend spatial database for GIS Mapping library for use in web and desktop applications. It provides access to many types of GIS data and enables spatial querying of that data GIS and Remote Sensing image processing system with an object-oriented data model which provides for the integration of raster and vector data representations in a single environment GIS application built using the TerraLib GIS library. TerraView main goal is to make available to the GIS Community an easy geographic data viewer with resources that include database queries and data analysis Application to generate exact Delaunay triangulations, constrained Delaunay triangulations, conforming Delaunay triangulations, Voronoi diagrams, and high-quality triangular meshes Open Source software library intended to provide a set of useful functions to deal with 3D surfaces meshed with interconnected triangles Software package for the display and analysis of satellite images, maps and associated databases, with an emphasis on early warning for food security Application offering a wide range of modeling tools, a customizable interface, support for lights and materials, and a built-in AutoUV mapping facility Source.