:bike: A preprocessor for anyone writing specifications that converts source files into actual specs.

Pure Go CSS Preprocessor

IPython nbconvert preprocessor for grading notebooks

C preprocessor and compiler implemented in Go for speed and portability

Xpath to CSS preprocessor

IRPF90 is a Fortran90 preprocessor written in Python for programming using the Implicit Reference to Parameters (IRP) method. It simplifies the development of large fortran codes in the field of scientific high performance computing.

PreForM.py, Preprocessor for Fortran poor Men

Normalize.css ported to the popular CSS preprocessor SCSS.

HTML preprocessor