l_mon is a tiny http server that provides access to /dev/video. It serves / and /frame.jpg. The former contains client-side javascript that fetches the latter at regular intervals. There is no CPU or network activity on the server unless a client is connected. Limited power and bandwidth use was a primary motivation. Its original purpose was a baby monitor. l_mon is written in C99 and depends only on libjpeg.
Download l_mon 1.0.