EBay founder and chairman Pierre Omidyar in Delaware on Dec. 7, 2009. REUTERS/Tim Shaffer While some tech executives are quick to splurge on yachts and mega-mansions, others aren't so flashy with their riches.

Mark Zuckerberg, for example, drives a $30,000 Volkswagen GTI, while Sergey Brin likes to buy things in bulk at Costco.

We've rounded up 10 tech executives who have made millions or even billions with their companies yet have chosen lives of frugality and charity.