Projects that are experimental or daringly innovating the terminal and command line world?

What projects are out there seeking to innovate in the terminal and command line space, and improve or revolutionize the terminal environment?

• NuShell is one such example, a shell that uses structured data in its pipelines. Many other experimental shells out there innovating in different spaces.
• An even more daring example is DomTerm. It's a terminal emulator with more rich rendering. Supports rich text, images, etc while maintaining xterm compatibility.

Please do not shy from answering projects that are very experimental, early stage, break a lot of backwards compatibility or radically change the current way of doing things.