Internal Revenue Service
Provides basic federal tax information for people who are starting a business and information to assist in making basic business decisions.

The Wall Street Journal - Center for Entreprenuers
Startup Journal

Entrepreneur.com
Startup Kits

Software:

Quicken.com
Quickbooks
Simply Accounting

Forms:

Small Business Administration
Small business forms
Federal forms

Microsoft Office templates

Score.org
template gallery

Associations & Non-Profit Support Organizations:

USASBE
The mission of the United States Association for Small Business and Entrepreneurship is to advance knowledge and foster business development through entrepreneurship education and research.

Edward Lowe Foundation
Providing support and assistance to second-stage companies - those that have grown past the startup stage but have not grown to maturity.

National Organization for the Self-Employed
The National Association for the Self-Employed (NASE) is the nation's leading resource for the self-employed and micro-businesses providing a broad range of benefits and support to help the smallest businesses succeed.

National Business Association
The National Business Association keeps members up-to-date and informed on important issues impacting the self-employed and small business community.

Small business forums:

The Small Business Community
Small Business Forum
Small Business Ideas Forum
Merchant Services Business Forum

Webhosting:

Yahoo small business
Christianwebhost.com

Tips, Advice & Articles:

The Small Business Blog
Visit the blog of Douglas Kersten, a small business owner for more then thirteen years as he shares what he has learned through both successes and failures.

Score.org Reading Room
More then 100 business articles