xtop is a suite of configurable source beautifiers.

jtop is a beautifier for java sources.
jtop is based on ptop.

ptop is a beautifier for pascal  sources, specially the ones supported by FPC.
ptop  belongs  to  the  FPC utils package.
This version of ptop from xtop has extended features.

The writer of the ptop is Michael Van Canneyt.

The program is a modernized (OOP, Streams,  Delphi  extensions) version based on a program by Peter Grogono,
who in turn based his program on a Pascal pretty-printer written by Ledgard, Hueras, and Singer.
See SIGPLAN Notices, Vol.12, No. 7, July 1977, pages  101-105,  and  PP.DOC/HLP.
This version of PP developed under Pascal/Z V4.0 or later.
Very minor modifications for Turbo Pascal made by  Willett Kempton  March 1984 and Oct 84.
Runs under 8-bit Turbo or 16-bit Turbo. 
Toad Hall tweak, rewrite for TP 5,  28  Nov  89

All xtop beautifiers are based on ptop.