BOSTON ( TheStreet) -- HomeAway ( AWAY) is the latest hotly anticipated initial public offering this year, with shares of the online vacation rental company rising 50% in their debut Wednesday. But other initial share sales made investors more money -- doubling returns in some cases.This year has already seen its share of super-hyped initial public offerings from companies like LinkedIn ( LNKD), ZipCar ( ZIP), Pandora ( P) and Spirit Airlines ( SAVE). Even more have filed for IPOs, including videogame maker Zynga and Groupon.
10. Responsys ( MKTG) Company Profile: Responsys provides on-demand software that enables email-based relationship marketing, allowing marketers to design email campaigns. Return Since IPO: 41.7% IPO Date: April 20 Offer Price: Responsys offered 6.6 million shares at $12 per share Analyst Consensus: Responsys gets high praise from Wall Street firms, as the five analysts following the stock rate it as either "buy" or "outperform," including those at Credit Suisse, JMP Securities and William Blair.