United States Small Business Association
Another U.S. government resource for writing a business plan.

SCORE
Business Plan templates from the non-profit organization SCORE, the "Counselors to America's Small Business" staffed by volunteer entrepreneurs and business professionals.

CCH Business Owner's Toolkit: Planning Your Business
Part of CCH Incorporated's Business Owner's Toolkit, including a thorough guide to preparing a business plan and varying methods of writing an effective one.

Bplans.com
"Bplans.com contains the largest single collection of free sample business plans online. In addition to that, it has helpful tools and know-how for managing your business. Bplans.com includes practical advice on planning, interactive tools, and a panel of experts who have answered more than 1,400 questions from people like you." Created and maintained by Palo Alto Software.

My Own Business
Detailed guide to business plans by My Own Business, Inc., a non-profit organization founded by Los Angeles entrepreneur Phil Holland, founder of the Yum Yum Donut Shops chain.

Business Plan Handbook
Extensive collection of actual business plans from small business entrepreneurs throughout North America. Browse through the 11 "volumes" or search by keyword for relevant plans.
Also available in print form as an 11-volume set in the Davis Library Reference Department.