Adena Schutzberg over at Directions Magazine/AllPointsBlog has posted her top 10 for the geospatial industry. The obvious ones are in there (Google, MapServer Foundation, USGS) along with a few that are pretty interesting.
The GEODE (Geographic Data in Education) Initiative “is dedicated to the improvement of Earth and environmental science education through the use of data visualization and analysis tools to support inquiry-based pedagogy.” The have created two data viewers that are available for download: My World GIS (45 day demo version) and WorldWatcher. These software packages are intended to make the GIS user experience more approachable. Head over to their website and check out the software and the project in general.