GIS

• Wikipedia list of GIS Software includes open source GIS software
• Geo Community GIS data not all OA. In addition to data, much information about GIS and the GIS community
• Open Street Map Wiki style world map and mapping community

Learn GIS

• Virtual Campus Training Seminars are free one-hour recorded presentations that include software demonstrations and question and answer sessions with ESRI's subject matter experts. These seminars require broadband connection. These seminars do not require code/s from DSS. 
• Instructional Series Podcasts are free, short audio recordings on a specific topic delivered by an ESRI's subject matter experts. Listen online or download to an MP3 player. These podcasts do not require code/s from DSS.

*A fantastic list of data and statistics sources is maintained by New York University's Data Service Studio