You can also try doing a Google search for free Photoshop Brushes. Many have made Photoshop Brushes saved them and made then available. Like Hair Brushes, eye brushes, mouse brush. Here are a few examples of brushes I have downloaded and one I created.
|Blue and yellow in water by fireplace33|
from Ink and water
|Kylmä joki kopio by Kaappo|
from Shutter speed 1/25 or slower
|WR_2.8_13 copy copy by photoprof|