Betty
Holberton-style C code checker written in Perl
...It identifies inconsistencies, style violations, and formatting issues in C source files. You should be aware that by default, some text editors are using spaces instead of tabs. For instance, when you press tab key on emacs, by default, leading spaces will be put, and that will cause Betty to raise a lot of warnings. Please find some help in the Tools section. Outside of comments and documentation, spaces are never used for indentation, and the above example is deliberately broken.