Photogrammetry/GIS:

• Open source bundle adjustment software: DGAP
• The most promising cross-platform Java GIS program to date: Open source JUMP GIS Workbench (OpenJUMP)
• Free-for-public-use high-quality digital geographic data for the North Central Texas region:  NCTCOG's GIS Data Clearinghouse
• Free online imagery: Terraserver-USA
• (Topologically Integrated Geographic Encoding and Referencing system) TIGER/Line vector data online
• Further GIS resources at UTA here