It's a classic business story: An entrepreneur comes up with a brilliant idea, pitches it to deep-pocketed investors and builds a billion-dollar company seemingly overnight. But not every successful business has gone that route. Many well-known brands started out growing slowly and methodically on their founders' own dime. Then they grow as founders sink internal cash flow to fund company development. Here are five that show good businesses can thrive even without a boost from the venture capital world.