Sikuli is a visual technology to search and automate graphical user interfaces (GUI) using images (screenshots). The first release of Sikuli contains Sikuli Script, a visual scripting API for Jython, and Sikuli IDE, an integrated development environment for writing visual...
tmux is a terminal multiplexer: it enables a number of terminals (or windows), each running a separate program, to be created, accessed, and controlled from a single screen. tmux may be detached from a screen and continue running in the background, then later reattached.
Byobu is a GPLv3 open source text-based window manager and terminal multiplexer. It was originally designed to provide elegant enhancements to the otherwise functional, plain, practical 
GNU Screen , for the Ubuntu server distribution.
Actiona (formerly known as Actionaz) is a task automation tool. It allows you to create and execute action lists.
Shinobi is an Open Source CCTV software written in Node.JS. Streams are img tags, but not MJPEG. Images are transferred through WebSocket. Files are saved in WebM videos, not JPEGs.
GNU Midnight Commander is a visual file manager, licensed under GNU General Public License and therefore qualifies as Free Software. Its a feature rich full-screen text mode application that allows you to copy, move and delete files and whole directory trees, search for files...
Fast image viewer with support for multiple formats, quick crop, rotate, lossless JPEG editing, drag-and-drop, thumbnail navigation, and slideshow mode.
