The following libraries are technically not part of Phix, but are included in the standard distribution.
bigatom - arbitrary precision arithmetic.
cffi - parse C struct and function definitions, and use them.
database - simple database system (copied from Euphoria).
dict - associative arrays.
pGUI - The Phix portable graphical user interface - 32/64 bit, Windows/Linux compatible.
ppp - Pete’s Pretty Print.
timedate - date and time routines, with timezone and daylight savings handling.
utfconv - simple conversion between UTF-8, UTF-16, and UTF-32.
Deprecated (but still supported):
Arwen - a fast, compact GUI library for Windows-based applications.
arwen32dib - fast bitmap manipulation (24-bit graphics).