Overlaying textures on top of your images can elevate a piece tremendously and give it a wonderful painterly quality.
I've put together a few bundles for you to download and experiment with (I find a blending mode such as Overlay or Soft light works really well on a low opacity).
They are yours to play with as you wish, no strings attached.
Just click on the image below and the chosen texture packs will download automatically.
Take one, take two, take them all if you like!