ESRI's GIS Portal Toolkit is a technology and services solution for implementing local, regional, national, and global spatial data infrastructure (SDI) portals. GIS portals organize content and services such as directories, search tools, community information, support resources, data, and applications. They provide capabilities to query metadata records for relevant data and services and link directly to the online sites that host content services. The content can be visualized as maps and used in geographic queries and analyses.
ESRI's GIS Portal Toolkit provides all the tools and templates to create a GIS portal. Based on ESRI'sArcGIS Server technology, this standards-based solution offered through ESRI's Professional Services is a cost-effective way to get a functional site up and running quickly.
Read more: http://www.esri.com/software/arcgis/gisportal-toolkit/index.html