MJPG-streamer takes JPGs from Linux-UVC compatible webcams, filesystem or other input plugins and streams them as M-JPEG via HTTP to webbrowsers, VLC and other software. It is the successor of uvc-streamer, a Linux-UVC streaming application with Pan/Tilt
Good, easy to configure, reliable. Warning: the connection credentials are written to /var/log/message.* in clear text!