Here is a list of all documented files with brief descriptions:

doc
programmer
mainpage.h
src
fem
vcsm.c	Class Vcsm methods
vcsm.h	Contains declarations for the Vcsm class
vfetk.c	Class Vfetk methods
vfetk.h	Contains declarations for class Vfetk
vpee.c	Class Vpee methods
vpee.h	Contains declarations for class Vpee
generic
apolparm.c	Class APOLparm methods
apolparm.h
bemparm.c	Class BEMparm methods
bemparm.h
femparm.c	Class FEMparm methods
femparm.h	Contains declarations for class APOLparm
geoflowparm.c	Class GEOFLOWparm methods
geoflowparm.h	Contains declarations for class GEOFLOWparm
mgparm.c	Class MGparm methods
mgparm.h	Contains declarations for class MGparm
nosh.c	Class NOsh methods
nosh.h	Contains declarations for class NOsh
pbamparm.c	Class PBAMparm methods
pbamparm.h	Contains declarations for class PBAMparm
pbeparm.c	Class PBEparm methods
pbeparm.h	Contains declarations for class PBEparm
pbsamparm.c	Class PBSAMparm methods
pbsamparm.h	Contains declarations for class PBSAMparm
vacc.c	Class Vacc methods
vacc.h	Contains declarations for class Vacc
valist.c	Class Valist methods
valist.h	Contains declarations for class Valist
vatom.c	Class Vatom methods
vatom.h	Contains declarations for class Vatom
vcap.c	Class Vcap methods
vcap.h	Contains declarations for class Vcap
vclist.c	Class Vclist methods
vclist.h	Contains declarations for class Vclist
vgreen.c	Class Vgreen methods
vgreen.h	Contains declarations for class Vgreen
vhal.h	Contains generic macro definitions for APBS
vmatrix.h	Contains inclusions for matrix data wrappers
vparam.c	Class Vparam methods
vparam.h	Contains declarations for class Vparam
vpbe.c	Class Vpbe methods
vpbe.h	Contains declarations for class Vpbe
vstring.c	Class Vstring methods
vstring.h	Contains declarations for class Vstring
vunit.h	Contains a collection of useful constants and conversion factors
mg
vgrid.c	Class Vgrid methods
vgrid.h	Potential oracle for Cartesian mesh data
vmgrid.c	Class Vmgrid methods
vmgrid.h	Multiresolution oracle for Cartesian mesh data
vopot.c	Class Vopot methods
vopot.h	Potential oracle for Cartesian mesh data
vpmg.c	Class Vpmg methods
vpmg.h	Contains declarations for class Vpmg
vpmgp.c	Class Vpmgp methods
vpmgp.h	Contains declarations for class Vpmgp
pmgc
buildAd.c
buildAd.h
buildBd.c
buildBd.h
buildGd.c
buildGd.h
buildPd.c
buildPd.h
cgd.c
cgd.h
gsd.c
gsd.h
matvecd.c
matvecd.h
mgcsd.c
mgcsd.h
mgdrvd.c
mgdrvd.h
mgfasd.c
mgfasd.h
mgsubd.c
mgsubd.h
mikpckd.c
mikpckd.h
mlinpckd.c
mlinpckd.h
mypdec.c
mypdec.h
newdrvd.c
newdrvd.h
newtond.c
newtond.h
powerd.c
powerd.h
smoothd.c
smoothd.h
apbs.h	Header file for header dependencies
main.c	APBS "front end" program using formatted input files
routines.c	Supporting routines for APBS front end
routines.h	Header file for front end auxiliary routines