As of 1.8.8 (Stable):

clickstats.php
custom_rss.php
custom_search.php
list.php
phpdig_logo_2.gif
phpdig_logo_2.png
phpdig_powered_2.gif
phpdig_powered_2.png
search.php

admin/cleanup_common.php
admin/cleanup_dashes.php
admin/cleanup_engine.php
admin/cleanup_keywords.php
admin/debug_functions.php
admin/deny.gif
admin/details.gif
admin/files.php
admin/fill.gif
admin/index.php
admin/install.php
admin/limit_update.php
admin/logout.php
admin/no.gif
admin/README.txt
admin/robot_functions.php
admin/spider.php
admin/statistics.php
admin/stop_spider.php
admin/update.php
admin/update_frame.php
admin/yes.gif

admin/temp/cronfile.txt
admin/temp/keepalive.txt

documentation/phpdig-api-en.html
documentation/phpdig-api-en.txt
documentation/phpdig-doc-en.html
documentation/phpdig-doc-en.txt
documentation/README.txt

includes/_connect.php
includes/common_words.txt
includes/config.php
includes/de_en_fr_common_words.txt
includes/it_common_words.txt
includes/README.txt
includes/style.css

information/CHANGELOG
information/COPYING
information/CREDITS
information/FILELIST
information/LICENSE
information/README

libs/auth.php
libs/authold.php
libs/function_phpdig_form.php
libs/htmlheader.php
libs/htmlmetas.php
libs/mysql_functions.php
libs/phpdig_functions.php
libs/search_function.php

locales/ca-language.php
locales/cs-language.php
locales/da-language.php
locales/de-language.php
locales/de-language-old.php
locales/en-language.php
locales/es-language.php
locales/fr-language.php
locales/gr-language.php
locales/it-language.php
locales/it-language-old.php
locales/nl-language.php
locales/no-language.php
locales/pt-language.php
locales/README.txt

rss/keepalive.txt

sql/init_db.sql
sql/update_db.sql
sql/update_db_to_1_4_4.sql
sql/update_db_to_1_4_5.sql
sql/update_db_to_1_6.sql
sql/update_db_to_1_6_1.sql
sql/update_db_to_1_8_1.sql
sql/update_db_to_1_8_2.sql
sql/update_db_to_1_8_4.sql
sql/update_db_to_1_8_5.sql
sql/update_db_to_1_8_6.sql
sql/README.txt

templates/black.html
templates/bluegrey.html
templates/corporate.html
templates/gaggle.html
templates/green.html
templates/grey.html
templates/lightgreen.html
templates/linear.html
templates/newspaper.html
templates/phpdig.html
templates/simple.html
templates/terminal.html
templates/yellow.html

text_content/keepalive.txt

tpl_img/aq_background.gif
tpl_img/bar_left.gif
tpl_img/bar_middle.gif
tpl_img/bar_right.gif
tpl_img/barre-verte.gif
tpl_img/barre-verte-bas.gif
tpl_img/barre-verte-bas-courte.gif
tpl_img/barre-verte-courte.gif
tpl_img/coininfd.gif
tpl_img/coininfg.gif
tpl_img/coinsupd.gif
tpl_img/coinsupg.gif
tpl_img/cprgo.gif
tpl_img/cprgradient.jpg
tpl_img/cprlogo.jpg
tpl_img/cprtitle.jpg
tpl_img/d.gif
tpl_img/fond.gif
tpl_img/g.gif
tpl_img/horzfeuil.gif
tpl_img/inf.gif
tpl_img/left.gif
tpl_img/orbar-center.gif
tpl_img/orbar-left.gif
tpl_img/orbar-right.gif
tpl_img/redbar_left.gif
tpl_img/redbar_middle.gif
tpl_img/redbar_right.gif
tpl_img/right.gif
tpl_img/space15_15.gif
tpl_img/sup.gif
tpl_img/vertfeuil.gif
tpl_img/weight.gif