Horizontal graph of word length
Retina, 5 + 3 = 8 bytes

 +
\n
.
*


Every line goes in its own file, so I've added 1 byte for each additional file. Also, the \n should be replaced with an actual newline.

Each pair of lines is a pattern-replacement pair.  + matches one or more spaces and replaces it with a newline. . matches any character except a newline, and it replaces that with a *. This is applied globally, so every character is replaced with a *.