add arks block editor (abe)

README.md

@@ -9,6 +9,8 @@ the (std) and (termina) sets).
 
 ```
 +----------------------+---------------------------------------+
+| abe                  | Arks block editor, for Arks style     |
+|                      | blocks                                |
 | kohure               | a memory browser/editor               |
 | kowae                | a program launcher                    |
 | taotaka              | a program launcher                    |
@@ -26,6 +28,7 @@ the (std) and (termina) sets).
 |                      | automata.                             |
 | conways-life         | John Conway's game of life, for the   |
 |                      | terminal                              |
+| mandelbrot           | jmf's mandelbrot viewer               |
 | pig                  | Pig: a game of chance                 |
 +----------------------+---------------------------------------+
 ```