Most free-form languages descend from Algol, including C, Pascal, and Perl. These are also structured programming languages, which is sometimes thought to go along with the free-form syntax: Earlier imperative programming languages such as Fortran used particular columns for line numbers, which structured languages don't use or need. Lisp languages are also free-form, although they do not descend from Algol.
One recent language which has abandoned parts of the free-form idiom is Python, which uses indentation with whitespace to delimit program blocks. Some critics regard this as a throwback, and find Python text harder to read and edit as it lacks the obvious punctuation of C or Pascal. Python aficionados, however, find that it improves readability: since indentation is commonly used in structured languages to make block structure visible, Python's use of whitespace ensures that the two are consistent.