GI-go is a graphical desktop client developed to easily demonstrate the capabilities of the GI-cat catalog service. User make distributed queries based on common search criteria (where, when, who, what) and gets metadata results from a variety of data sources. Data preview and download is also supported.

Distributed search on a variety of data sources:

• WCS 1.0, 1.1
• WMS 1.3.0, 1.1.1
• WFS 1.0.0
• CSW 2.0.2 Core, AP ISO 1.0, ebRIM/CIM, ebRIM/EO
• THREDDS 1.0.1, NEW 1.0.2
• Accessors for GeoNetwork (tested with versions 2.2.0 and 2.4.1) and deegree (tested with version 2.2) catalog services
• OpenSearch accessor
• GENESI RDF OpenSearch accessor
• Download and visualization of XML metadata
• CDI 1.04, 1.3
• GI-cat 5.x, 6.x
• GBIF

GI-cat is an implementation of distributed catalog services made by ESSI Lab:

• Allows clients to discover and evaluate geoinformation resources over a federation of data sources;
• Allows different clients to use the service, as it publishes different catalog interfaces.

A data provider can deploy his/her own GI-cat instance, grouping together disparate data sources, to accommodate his/her user needs.

Data sources:

• OGC WCS 1.0, 1.1
• OGC WMS 1.3.0, 1.1.1
• OGC WFS 1.0.0
• OGC CSW 2.0.2 Core, AP ISO 1.0, ebRIM/CIM, ebRIM/EO
• THREDDS 1.0.1, 1.0.2
• CDI 1.04, 1.3
• GI-cat 5.x, 6.x
• GBIF
• GeoNetwork (versions 2.2.0 and 2.4.1) catalog service
• deegree (tested with version 2.2) catalog service
• OpenSearch accessor
• GENESI DR OpenSearch accessor 

Profilers:

ESRI's ArcExplorer is a lightweight, no-cost GIS data viewer. Note that the .NET version of ArcExplorer is significantly different from the Java edition.

ArcGIS Server is ESRI's network- and webservice-centric GIS application suite. Among other, ArcGIS Server offers WMS, WFS, WFS-T, WCS, and KML service capability as well as web application SDKs for JavaScript, Flex, Silverlight, .Net, and Java.

ESRI's ArcGIS Desktop GIS application suit includes popular GIS applications such as ArcMap and ArcCatalog.

GeoServer is an open source software server written in Java that allows users to share and edit geospatial data. Designed for interoperability, it publishes data from any major spatial data source using open standards.

Being a community-driven project, GeoServer is developed, tested, and supported by a diverse group of individuals and organizations from around the world.

deegree is a Java Framework offering the main building blocks for Spatial Data Infrastructures. Its entire architecture is developed using standards of the Open Geospatial Consortium (OGC) and ISO/TC 211 (ISO Technical Committee 211 -- Geographic Information/Geomatics).