The best open source alternative to GRASS GIS is QGIS. If that doesn't suit you, our users have ranked more than 25 alternatives to GRASS GIS and 12 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to GRASS GIS are Placemark, Plus Codes, PostGIS and OpenLayers.
A fully featured, user friendly, open source Geographic Information System (GIS) with similar power to ArcGIS and MapInfo.
QGIS is the most popular Windows, Android, Mac & Linux alternative to GRASS GIS.
QGIS is the most popular Open Source & free alternative to GRASS GIS.
The Placemark application. This is a web application that lets you import, create, export, visualize, and publish geospatial data. It supports many geospatial data formats, and many editing operations, both algorithmic, like buffering, and drawing-based.
Placemark is the most popular Web-based & Self-Hosted alternative to GRASS GIS.
A plus code address looks like a regular address, but with a short code where the street name and number would be. These addresses exist for any location, even for places where there are no roads.
PostGIS 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 geographic information systems (GIS), much like ESRIs SDE...
OpenLayers is a high-performance, feature-packed library for all your mapping needs.
The reference implementation of the Open Geospatial Consortiums WFS and WMS services, GeoServer is a full featured open source software server written in Java that allows users to query, visualize, combine, edit and publish spatial data over the web.
SAGA - System for Automated Geoscientific Analyses - is a Geographic Information System (GIS) software with immense capabilities for geodata processing and analysis. SAGA is programmed in the object oriented C++ language and supports the implementation of new functions with a...
uDig is a GIS software program produced by a community led by Canadian-based consulting company Refractions Research. It is based on the Eclipse platform and features full layered open source GIS. It is written in Java and released under GNU Lesser General Public License.
MapWindow is a fully free and open source geographic information system project. It includes an open source programming component, MapWinGIS ActiveX, and an extensible desktop application that supports plug-ins written in .NET (C# and VB.NET).
MapServer is an Open Source platform for publishing spatial data and interactive mapping applications to the web. Originally developed in the mid-1990’s at the University of Minnesota, MapServer is released under an MIT-style license, and runs on all major platforms (Windows...
OpenJUMP is an open source Geographic Information System (GIS) written in the Java programming language. It is developed and maintained by a group of volunteers from around the globe.
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