Download the new Orbit Explorer 4.3 for free

For starters Orbit Explorer is free gis desktop viewer from orbit GeoSpatial Technologies and its known for its wide range of functionalities for a GIS viewing tool. Orbit Explorer also supports the compressed imagery like MrSID,ECW and OMI (Orbit's free portable format). It also supports the viewing data through a WMS Service. All in all Orbit Explorer is a free GIS Desktop viewer thats offers a complete set of functionality for GIS Data viewing and more importantly its fee for personal and corporate use and free to redistribut with your data.

Orbit Explorer's features (taken from www.orbitgis.com)

Viewing Capabilities
pan, roam, zoom, fast smartzoom with mouse-wheel, set to scale
select, identify, inspect objects and object details
find, focus to selection
measure, view co-ordinates
simple legend editing
supports maptips and hyperlinks
supports annotations and redlining
supports object-embedded annotations (view only)
supports Orbit GIS legends & resource descriptor extensions
supports Orbit native formats
supports resource related scale limits
export view as image
copy view to clipboard
print using print layout template, includes Template Editor
platform independent viewing
backdrop color change
magnifier view
overview window
move to co-ordinate
resource solo-view
resource solo-safe
resource view source & format
multiple Dataset Lists
About Resources
supports Orbit Workspaces (read & write)
unlimited data resources
resource inspection, contents and structure viewing
attribute table viewing and querying, attribute statistics
native support of most popular formats (vector and imagery data)
supports EOS servers real-time
on-the-fly geofusion between local and remote resources
database connections manager
About Users
free viewing tool
free redistributable
supports EOS login
About Extensions
Extensions require Orbit Explorer Plus or Orbit GIS.

For more information visit http://www.orbitgis.com/