Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
What is the freedom of birds and the pen of old men?
Feathers. Feathers make up a bird's wings, giving it flight or its freedom. Quill pens were used by men in older times.
I speak without a mouth and hear without ears. I have nobody, but I come alive with wind. What am I?
This riddle relies on tricking you into thinking about ears and a mouth. You get a tiny hint about wind to encourage you to think broadly and avoid the literal.