Different GIS applications Available Cont..

MapServer

And this is my favourite. Mapserver is Web-based mapping server, developed by the University of Minnesota. MapServer was originally developed with support from NASA, which needed a way to make its satellite imagery available to the public

Mapserver is an open source development environment for building spatially-enabled intranet applications.
It can run as a CGI program or via mapserver which supports several programming languages


Mapserver is not complete GIS Application but it excels in rendering…
It facilitates to render the spatial data

Features
· Advanced cartographic output
o Scale dependent feature drawing and application execution
o Feature labeling including label collision mediation
o Fully customizable, template driven output
o TrueType fonts
o Map element automation (scalebar, reference map, and legend)
o Thematic mapping using logical- or regular expression-based classes
· Support for popular scripting and development environments
· PHP, Python, Perl, Ruby, Java, and C#
· Cross-platform support
o Linux, Windows, Mac OS X, Solaris, and more
· A multitude of raster and vector data formats
o TIFF/GeoTIFF, EPPL7, and many others via GDAL
o ESRI shapfiles, PostGIS, ESRI ArcSDE, Oracle Spatial, MySQL and many others via OGR
o Open Geospatial Consortium (OGC) web specifications
§ WMS (client/server), non-transactional WFS (client/server), WMC, WCS, Filter Encoding, SLD, GML, SOS
· Map projection support
o On-the-fly map projection with 1000s of projections through the Proj.4 library
· Latest release is 5.0.0/17 on 17th September 2007 available here



Others...


Still There are so many Open source applications available. I am not able to discuss every thing here but I will try at least to name some of them


· SAGA GIS – – System for Automated Geoscientific Analyses- a hybrid GIS software. SAGA has a unique Application Programming Interface (API)and a fast growing set of geoscientifc methods, bundled in exchangeable Module Libraries.
· Quantum GIS – QGIS is a user friendly Open Source GIS that runs on Linux, Unix, Mac OS X, and Windows.
· ILWIS – ILWIS (Integrated Land and Water Information System) integrates image, vector and thematic data.
· Chameleon – Environments for building applications with MapServer.
· GeoNetwork opensource – A catalog application to manage spatially referenced resources
· GeoTools – Open source GIS toolkit written in Java, using Open Geospatial Consortium specifications.
· JUMP GIS – Java Unified Mapping Platform. (See end of page for JUMP derivative projects, like Kosmo and OpenJUMP)
· MapGuide Open Source – Web-based mapping server.
· OpenLayers – open source AJAX library for accessing geographic data layers of all kinds, originally developed and sponsored by MetaCarta
· PostGIS – Spatial extensions for the open source PostgreSQL database, allowing geospatial queries.
· TerraView – GIS desktop that handles vector and raster data stored in a relational or geo-relational database.
· Xastir A special purpose Open Source GIS application used as an APRS client by Amateur radio operators, written in C for X Window environments.