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[3893 users on Ohloh]
MySQL, the most popular Open Source SQL database management system, is developed, distributed, and supported by Sun Microsystems.
PostgreSQL Database Server
[1046 users on Ohloh]
PostgreSQL is a powerful, open source relational database system. It has more than 15 years of active development and a proven architecture that has earned it a strong reputation for reliability, data integrity, and correctness. It runs on all major operating systems, including Linux, UNIX (AIX, BSD, HP-UX, SGI IRIX, Mac OS X, Solaris, Tru64), and Windows.
Drupal (contributions)
[179 users on Ohloh]
Drupal is an open source content management platform, allowing an individual or a community of users to easily publish, manage and organize a great variety of content on a website.

Equipped with a powerful blend of features, Drupal is able to support community sites, blogs, portals and more.

This is the contributions repository containing contributed modules, themes, translations and installation profiles. You can find the Drupal core project at http://ohloh.net/projects/3189.

[83 users on Ohloh]
PostGIS is a spatial database extension for PostgreSQL. PostGIS complies with the OpenGIS "Simple Features for SQL" specification, and provides high-performance spatial SQL access to GIS objects in the database.
[80 users on Ohloh]
Tags: mapping gis maps osgeo
OpenLayers is a web mapping framework, allowing users to pull in disparate sources of data and display them in an AJAX mapping interface.
[79 users on Ohloh]
Tags: mapping gis mapserver osgeo
MapServer is an Open Source platform for publishing spatial data and interactive mapping applications to the web.
[65 users on Ohloh]
Tags: osgeo gis gdal mapping ogr
GDAL is a translator library for raster geospatial data formats. The related OGR library (which lives within the GDAL source tree) provides a similar capability for simple features vector data.
Quantum GIS
[62 users on Ohloh]
Quantum GIS (QGIS) is a user friendly Open Source Geographic Information System (GIS) that runs on Linux, Unix, Mac OSX, and Windows. QGIS supports vector, raster, and database formats. QGIS is licensed under the GNU General Public License. QGIS lets you browse and create map data on your computer. It supports many common spatial data formats (e.g. ESRI ShapeFile, geotiff).
[60 users on Ohloh]
OpenStreetMap is a free editable map of the whole world. It is made by people like you.

OpenStreetMap allows you to view, edit and use geographical data in a collaborative way from anywhere on Earth.

TikiWiki CMS/Groupware
[50 users on Ohloh]
A full-featured, web-based, multilingual, tightly integrated, all-in-one Wiki+CMS+Groupware, using PHP, ADOdb, Zend Framework, jQuery and Smarty. Can be used to create all sorts of Web applications, sites, portals, knowledge bases, intranets, and extranets.

Tiki offers a very large number of features "out-of-the-box", arguably more than any other Open Source Web Application. Highly configurable & modular, all the features are optional and administered via a ...

[40 users on Ohloh]
GeoServer connects your information to the Geospatial Web.

With GeoServer you can publish and edit data using open standards. Your information is made available in a large variety of formats as maps/images or actual geospatial data. GeoServer's transactional capabilities offer robust support for shared editing. GeoServer's focus is ease of use and support for standards.

[39 users on Ohloh]
PROJ.4 - Cartographic Projections library
eZ Publish
[38 users on Ohloh]
eZ Publish is an enterprise open source content management system and development framework with functionality for web publishing, intranets, e-commerce, extranets and portals.
[36 users on Ohloh]
Commonly referred to as GRASS, this is a Geographic Information System (GIS) used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization. GRASS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies.
[33 users on Ohloh]
JOSM is an editor for OpenStreetMap written in Java 1.5. The current version supports stand alone GPX tracks, GPX track data from the OSM database and existing nodes, line segments and metadata tags from the OSM database.
[24 users on Ohloh]
GeoTools is an open source (LGPL) Java code library which provides standards compliant methods for the manipulation of geospatial data, for example to implement Geographic Information Systems (GIS). The GeoTools library implements Open Geospatial Consortium (OGC) specifications as they are developed, in close collaboration with the GeoAPI and GeoWidgets projects.
[22 users on Ohloh]
GEOS (Geometry Engine - Open Source) is a C++ port of the Java Topology Suite (JTS). As such, it aims to contain the complete functionality of JTS in C++. This includes all the OpenGIS "Simple Features for SQL" spatial predicate functions and spatial operators, as well as specific JTS topology functions such as IsValid().
GeoNetwork opensource
[21 users on Ohloh]
GeoNetwork opensource is a standardized and decentralized spatial information management environment, designed to enable access to geo-referenced databases, cartographic products and related metadata from a variety of sources, enhancing the spatial information exchange and sharing between organizations and their audience, using the capacities of the internet. This approach of geographic information management aims at facilitating a wide community of spatial information users to have easy and tim...
[16 users on Ohloh]
gvSIG is a tool oriented to manage geographic information. It is characterized by a user-friendly interface, with a quick access to the most usual raster and vector formats. In the same view it includes local as well as remote data through a WMS, WCS or WFS source.

It is aimed at users of geographic information, whether professionals or civil servants (city councils, councils, regional councils or ministries) from any part of the world (its interface is in several languages), in addition ...

[16 users on Ohloh]
Mapbender is an OSGeo Project about maps. The software is used to implement portal web sites for geo spatial data and maps. Mapbender can upload, manage, combine and request OGC OWS compliant map and feature services like MapServer and GeoServer. Mapbender is used to orchestrate these services in distributed web based architectures.

Mapbender is implemented in PHP, JavaScript, SQL and XML, provides a data model and interfaces for displaying, navigating and querying OGC compliant map servi...