I've written a few Slim templates this quarter, and I'm making them available here in the event others may find them useful.
ColorGrade.slim - An implementation of Nuke's Grade node (Color Utility)
Grade.slim - An implementation of Nuke's Grade node (Float Utility)
ColorMerge.slim - A merge node with a mask and several blending modes
Schlick.slim - A float output of the Fresnel Schlick function