GCC C Preprocessor (cpp) - Top (The C Preprocessor)
Text Workflow - Text Workflow app for Mac
Gema - General purpose text macro processor.
Convert Case - Easily convert text between different cases: lower case, UPPER CASE, Sentence case and Capitalized...
GNU M4 - GNU M4 is an implementation of the m4 macro preprocessor.
CaseConverter.cc - Case Converter is a free, open-source online tool for converting text to lowercase, uppercase, title case, capital case, or sentence case.