Harry's Filters is a free Photoshop-compatible plugin containing up to 69 different image effects. They were formerly also known under the name "VideoRave".
The main effect categories are called Color, Artistic, Gradients, Patterns, Warp, Noise, En/Decrypt, Other and Nature. They include filters for changing the image color or mood, for creating artistic effects, producing colorful gradients or impressive patterns, warping images and adding special noise effects to image. Additionally they let you encrypting and decrypting images with 64 bit keys, produce zoom, mirror or paint effects as well as natural effects like lightning, tornado and polar lights.
Harry's Filters is very easy and comfortable to use. It can be applied to RGB as well as Grayscale images. A Jump button lets you create interesting random effects and explore the possibilities of each filter effect. Options for saving and opening effect presets allow the user to store his favorite effects and reuse them later. An Instant Preview check box updated the preview while you drag the sliders.