Hawkeye
Hawkeye is a simple, robust, easy to use USB webcam streaming web server which uses MJPEG as the video codec. It is designed to be usable on local networks as well as the Internet, supporting HTTPS and Basic Authentication. It comes with an HTML video stream viewer optimized for desktop and mobile usage. Lastly, Hawkeye supports multiple webcams.
Hawkeye was built to work on low power devices such as the Raspberry Pi but will work equally well on desktops and laptops alike.