Shake Macros
Back in the day, Shake was a powerhouse, but luma has fully transitioned to compositing in Nuke. Please be advised they are no longer supported.
Color

Expand, Compress, and Gamma controls in a nice neat package.

Instead of typing "rrrr", "ggg", "bbb" into a reorder node.

"Film Look" (expects a log input).

Matches the Nuke equivalent lookup, (expects a log input).

Correct Log/Lin conversion (converts to float)
Layer

Very powerful tool for layering a foreground over a background.

Applies the color of the background to the foreground image without effecting luminance of the foreground.

Much like a Keymix but uses an Over node instead of a Mix node

Will perform a proper screen operation on two Log inputs in 16 bit.
Transform

A resize node the maintains pixel aspect ratio. Includes many common presets.
Filter

Blurs exponentially. Most often used with roto shapes. (requires an alpha channel)
Key

performs a spill suppress and can use the background as the replaced color

removes stray pixels from the alpha channel of your matte