GeoServer

GeoServer is an OpenGIS "Transactional Web Feature Server" (WFS-T) and "Web Map Server" (WMS) that provides read/write access to numerous spatial data sources via standard internet protocols.

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, in order to serve as 'glue' for the geospatial web, connecting from legacy databases to many diverse clients.

GeoServer supports WFS-T and WMS open protocols from the OGC to produce JPEG, PNG, SVG, KML/KMZ, GML, PDF, Shapefiles and more. More information on specific features of GeoServer can be found here, and some samples of GeoServer in action are in the gallery.

LISAsoft uses Geoserver internally for many of our mapping services and our developers have contributed to Geotools, the core libraries used by Geoserver.
As part of the Canadian Geographic Data Interoperability project, LISAsoft contributed cascading WFS support to allow GeoServer to aggregate several other WFS based services.