Caricature plug-in adds set of liquid brushes to DAP to easily distort the source photo into caricature.

But that's not all! You can also use it for general editing - like adding smile to the portraits, slimming figures or changing their posture. Another example would be adding various deliberate twirls to paintings to experience VanGogh style. Or if you are the adventurous type, use it to create new abstract art by completely twirling and twisting any photo beyond recognition.

Lens Correction plug-in corrects typical lens distortion in modern digital cameras: Barrel and Pincushion distortion.

Barrel distortion is visible in wide angles when straight lines appear as an arc, more visible closer to the edges of the image (such as frames, doors, windows, buildings).
It may be not noticeable on the photo as we are all pretty much used to this effect, but on a painted image this become an apparent giveaway that it is a photography source.

Image on the left is before correction, image on the right is after correction.