San Antonio Botanical Garden
- Offers educational events, programs, and classes year-round.
- http://www.sabot.org/

San Antonio Audubon Society
- Conservation and birding club. Includes local birding sites, siting list, and information on meetings and membership.
- http://www.saaudubon.org/

Scobee Planetarium
- At San Antonio College. Information on public shows and school and continuing education programs.
- http://www.accd.edu/sac/ce/scobee/

San Antonio Astronomical Association
- Club information, events, astronomy news and issues, and links to related sites.
- http://www.sanantonioastronomy.org/

South West Research Institute
- Non-profit applied research and development organization specializing in the creation and transfer of technology in engineering and the physical sciences.
- http://www.swri.edu/