:bike: A preprocessor for anyone writing specifications that converts source files into actual specs.
IPython nbconvert preprocessor for grading notebooks
C preprocessor and compiler implemented in Go for speed and portability
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.
Normalize.css ported to the popular CSS preprocessor SCSS.