FX Shaders is a pack of 8 shaders:

UPDATED! FX Shaders has been updated to version 2.4. On Carrara 5 a compatibility fix between the FlipFlop shader and the Driven 2.0 tweener. Also, a CAPS LOCK Direct input entry for Carrara 5. If CAPS LOCK is enabled when clicking on Choose, you can input the object name directly from the keyboard.

Binary
Binary is a new addition to FX Shaders only available in the PiggyPack. Binary takes a subshader's luminance values and returns a pure white and black image depending on whether those luminance values are higher or lower than a user set grayscale value.

Flipped Normals
Flipped Normals is another new addition to FX Shaders just for the PiggyPack. It returns a black or white color for whether the normal of the surface is facing towards the camera or not.

This is useful shading the inside of an open surface. Just take a look at the example below of a cylinder with the top opened up.

FlipFlop
New complex shader. Animateable switch alllows you to change between 2 shaders instantly without interpolation.

Center Depth
Returns a grayscale corresponding to the overall distance from the center of the object to the point being shaded.

Point At Shader
Takes a subshader and makes sure that the shading always points towards a selected object.

Fake X-Ray
Returns a grayscale of the "thickness" of an object relative to the rendering camera.

Punchline
Returns a grayscale of the outer silhouette of an object relative to the rendering camera. This silhouette can be of a hard edge or a soft edge gradient style. This differs from toon shader outlines in that the shading is done on a per shader basis and can be combined in other shader hierarchies.

Track Shader
Takes the transform of a selected object and applies its transform to the transform of a subshader. The transform can be applied globally or locally. Useful for deliberately, "swimming" a texture across an object's surface.

FX Shaders is a shader package available as part of the PiggyPack collection. The purchase of a serial code will enable all 11 plugins of the PiggyPack. FX Shaders will run in evaluation mode without the serial code. The PiggyPack is available for download here.