Type vlist to see the words available. Use dump to see the stack, and 1 trace to enable a stack dump at each interpreted instruction.
I make no apologies for its speed, completeness, or ability to perform real-worlds tasks. It was written purely as a proof of concept, on an idle Sunday morning. (And the odd evening.)
If you visit Github for Jedi Forth you can grab the source. The README illustrates its many shortcomings.
It was released on May the 4th 2015, so I'm not apologizing for the bad pun, nor changing the name. (Until Disney sues me!)
The full source to Jedi Forth is available!