Daniel Harple (born July 23, 1959) is an American entrepreneur, investor, inventor and engineer best known for his role in the creation of several Internet standards, among them, Real Time Streaming Protocol used in entertainment and communications systems such as YouTube, RealPlayer, QuickTime, Skype, and others. Harple has been called a visionary, an Internet pioneer, and a "serial entrepreneur", founding multiple technology start-ups and playing a key role in the development of technologies like collaborative groupware, Voice over IP, and interactive screen sharing whiteboards. Harple also holds a number of core technology patents for inventions in VoIP, media streaming, real time web communications, collaborative computing, and location-based social media.