GNU nano is a console text editor, modelled after Pico. It is very newcomer-friendly due to on-screen menus with always visible keyboard shortcuts. Keybindings are configurable, and full undo and redo actions are supported. Nano even can be used as STDIN pager, and it provides fast syntax highlighting, even for regexps.
minor bugfix: "Sapperdeflap". Two introduced in version 4.9 are : the cursor. Getting misplaced when undoing line cuts, and filtering of the whole buffer to a new buffer not working.