South Dakota Auction Guide
- Searchable calendar listings of auctions sales bills for real estate, farm, auto, antiques, construction, and industrial.
- http://www.southdakotaauctionguide.com

Black Hills Virtual Mall
- Directory of businesses organized by category.
- http://mall.blackhills.net/

South Dakota Beef Industry Council
- Free educational materials, recipes, nutrition information, activities, things for kids, free materials and gift shop, and contact information.
- http://www.sdbeef.org/

South Dakota Rural Enterprise, Inc.
- A statewide organization committed to securing more capital for South Dakota's revolving loan funds; provides training, technical assistance and networking for economic development corporations.
- http://www.sdrei.org/