From a start-up that offers MBAs for hourly hire (Hourly Nerd) to a news aggregation app (Summly) that was created by a teenager and recently bought by Yahoo, innovation is in full swing.

"I don't think there's ever been a better time to be an entrepreneur," said Ted Leonsis, a longtime tech executive, on CNBC Thursday. "Part of the reason is that big companies, they're not innovating. They're trying to protect what they have. They're not spending their cash. They're not making the appropriate investments."