Add https://hex2txt.fly.dev/ links to README.

README.md

@@ -9,9 +9,18 @@ The LLM you're using to help with development might not know about the
 libraries you're using. Use `hex2txt` to generate documentation for
 inference-time consumption.
 
-## Demo/Example
+## Try It
 
-(TODO)
+See [https://hex2txt.fly.dev](https://hex2txt.fly.dev).
+
+Some examples:
+
+- https://hex2txt.fly.dev/geo/llms.txt
+- https://hex2txt.fly.dev/flop_phoenix/llms.txt
+- https://hex2txt.fly.dev/phoenix_live_view/llms.txt
+- https://hex2txt.fly.dev/elixir/1.18.0-rc.0/llms.txt
+- https://hex2txt.fly.dev/ecto_ulid_next/1.0.2/llms.txt
+- https://hex2txt.fly.dev/phoenix/1.7.17/llms.txt
 
 ## License