From the web site: "Prosper Portland connects people and resources to create more jobs for Portland. We work with Portland businesses to identify business needs and eligibility for assistance, and then help you find the program that fits best." Programs exist at Urban Renewal Area (URA) and citywide levels.
The national site provides help with Business Advice, Starting UP, Running & Growing a Business, Marketing, Finance & Money, Technology, and Management. Check out the Portland site for local workshops.
The U. S. government's Small Business Administration delivers loans, loan guarantees, contracts, counseling sessions and other forms of assistance to small businesses. This page has help with various aspects of starting and managing a business, from the business plan to licenses and registration, to financing, paying taxes, and hiring employees.
Business Oregon is the state's economic development agency. Its mission is to "create, retain, expand and attract businesses that provide sustainable, living-wage jobs for Oregonians through public-private partnerships, leveraged funding and support of economic opportunities for Oregon companies and entrepreneurs."