As of 2017-08-04 this is the list of fonts.google.com as taken from a listing
of the "ofl" directory in the repository for it (https://github.com/google/fonts).
We concluded that at least some of the fonts (maybe all of them) are simply taken
from upstream sources.

This is a very long list, so I want to use this thread to dissect it and collect
upstream sources. For what reasons?
- We will be able to create a "google-fonts-meta" package so that someone could
  use it to run an alternative to google font hosting, or even host it locally
  for whatever reasons.
- Because some of the fonts are really good and if people could just use them
  from guix instead of google.com, that's cool.
- More organs means better human! Ehm... more fonts are better, of course.
- For science. And last not least:
« - Dis Cortex, tu veux faire quoi cette nuit ?
- La même chose que chaque nuit, Minus, tenter de conquérir le monde !

Fonts we have are marked with an "#" at the start of the name
and comment below if necessary.
URLs will be written in parens behind a font, like
craftygirls/  (https://random.host/dist/doesnotexist)

A bugtracker might not be ideal for this, but it is a start.

UFL:
# ubuntu/ ubuntucondensed/ ubuntumono/
# Assuming that ubuntucondensed is "Ubuntu-C".

APACHE:
aclonica/
arimo/
calligraffitti/
cherrycreamsoda/
chewy/
comingsoon/
cousine/
craftygirls/
creepstercaps/
crushed/
droidarabickufi/
droidarabicnaskh/
droidsans/         (http://www.cosmix.org/software/  but https://packages.gentoo.org/packages/media-fonts/droid has additional sources)
droidsansethiopic/
droidsansjapanese/
droidsansmono/
droidsanstamil/
droidsansthai/
droidserif/
droidserifthai/
fontdinerswanky/
homemadeapple/
irishgrover/
irishgrowler/
jsmathcmbx10/
jsmathcmex10/
jsmathcmmi10/
jsmathcmr10/
jsmathcmsy10/
jsmathcmti10/
justanotherhand/
kranky/
luckiestguy/
maidenorange/
montez/
mountainsofchristmas/
nokora/
opensans/
opensanscondensed/
opensanshebrew/
opensanshebrewcondensed/
permanentmarker/
rancho/
redressed/
#roboto/
#robotocondensed/
#robotomono/
robotoslab/ (https://github.com/googlefonts/robotoslab)
rochester/
rocksalt/
satisfy/
schoolbell/
slackey/
smokum/
specialelite/
sunshiney/
syncopate/
tinos/
ultra/
unkempt/
walterturncoat/
yellowtail/

OFL:
abeezee/
abel/
abhayalibre/
abrilfatface/
abyssinicasil/
acme/
actor/
adamina/
adobeblank/
adventpro/
aguafinascript/
akronim/
aksarabaligalang/
aladin/
aldrich/
alef/
alefhebrew/
alegreya/
alegreyasans/
alegreyasanssc/
alegreyasc/
alexbrush/
alfaslabone/
alice/
alike/
alikeangular/
allan/
allerta/
allertastencil/
allura/
almendra/
almendradisplay/
almendrasc/
amarante/
amaranth/
amaticasc/
amaticsc/
amethysta/
amiko/
amiri/
amita/
amstelvaralpha/
anaheim/
andada/
andadasc/
andika/
angkor/
annieuseyourtelescope/
#anonymouspro/
antic/
anticdidone/
anticslab/
anton/
antonio/
arapey/
arbutus/
arbutusslab/
architectsdaughter/
archivo/
archivoblack/
archivonarrow/
archivovfbeta/
arefruqaa/
arimamadurai/
arizonia/
armata/
arsenal/
artifika/
arvo/
arya/
asap/
asapcondensed/
asapvfbeta/
asar/
asset/
assistant/
astloch/
asul/
athiti/
atma/
atomicage/
aubrey/
audiowide/
autourone/
average/
averagesans/
averiagruesalibre/
averialibre/
averiasanslibre/
averiaseriflibre/
badscript/
bahiana/
baloo/
baloobhai/
baloobhaina/
baloochettan/
balooda/
baloopaaji/
balootamma/
balootammudu/
baloothambi/
balthazar/
bangers/
barrio/
basic/
battambang/
baumans/
bayon/
belgrano/
bellefair/
belleza/
benchnine/
bentham/
berkshireswash/
bevan/
bhavuka/
bigelowrules/
bigshotone/
bilbo/
bilboswashcaps/
biorhyme/
biorhymeexpanded/
biryani/
bitter/
blackopsone/
bokor/
bonbon/
boogaloo/
bowlbyone/
bowlbyonesc/
brawler/
breeserif/
brunoace/
brunoacesc/
bubblegumsans/
bubblerone/
buda/
buenard/
bungee/
bungeehairline/
bungeeinline/
bungeeoutline/
bungeeshade/
butcherman/
butchermancaps/
butterflykids/
cabin/
cabincondensed/
cabinsketch/
cabinvfbeta/
caesardressing/
cagliostro/
cairo/
cambay/
cambo/
candal/
#cantarell/
cantataone/
cantoraone/
capriola/
cardo/
carme/
carroisgothic/
carroisgothicsc/
carterone/
catamaran/
caudex/
caveat/
caveatbrush/
cedarvillecursive/
cevicheone/
changa/
changaone/
chango/
chathura/
chauphilomeneone/
chelaone/
chelseamarket/
chenla/
cherryswash/
chicle/
chivo/
chonburi/
cinzel/
cinzeldecorative/
clara/
clickerscript/
coda/
codacaption/
codystar/
coiny/
combo/
comfortaa/
concertone/
condiment/
content/
contrailone/
convergence/
cookie/
copse/
corben/
cormorant/
cormorantgaramond/
cormorantinfant/
cormorantsc/
cormorantunicase/
cormorantupright/
courgette/
coustard/
coveredbyyourgrace/
creepster/
creteround/
crimsontext/
croissantone/
cuprum/
cutive/
cutivemono/
cwtexfangsong/
cwtexhei/
cwtexkai/
cwtexming/
cwtexyen/
damion/
dancingscript/
dangrek/
dawningofanewday/
daysone/
dekko/
delius/
deliusswashcaps/
deliusunicase/
dellarespira/
denkone/
devonshire/
dhurjati/
dhyana/
didactgothic/
digitalnumbers/
dinah/
diplomata/
diplomatasc/
domine/
donegalone/
doppioone/
dorsa/
dosis/
dosisvfbeta/
drsugiyama/
durusans/
dynalight/
eaglelake/
eater/
eatercaps/
ebgaramond/
economica/
eczar/
ekmukta/
electrolize/
elmessiri/
elsie/
elsieswashcaps/
emblemaone/
emilyscandy/
encodesans/
encodesanscondensed/
encodesansexpanded/
encodesanssemicondensed/
encodesanssemiexpanded/
encodesansvfbeta/
engagement/
englebert/
enriqueta/
ericaone/
esteban/
euphoriascript/
ewert/
exo/
exo2/
expletussans/
fanwoodtext/
fascinate/
fascinateinline/
fasterone/
fasthand/
faunaone/
faustina/
faustinavfbeta/
federant/
federo/
felipa/
fenix/
fingerpaint/
#firamono/
firasans/                (https://github.com/mozilla/Fira/releases)
firasanscondensed/       #
firasansextracondensed/  #
fjallaone/
fjordone/
flamenco/
flavors/
fondamento/
forum/
francoisone/
frankruhllibre/
freckleface/
frederickathegreat/
fredokaone/
freehand/
fresca/
frijole/
fruktur/
fugazone/
gabriela/
gafata/
galdeano/
galindo/
gemunulibre/
gentiumbasic/
gentiumbookbasic/
geo/
geostar/
geostarfill/
germaniaone/
gfsdidot/
gfsneohellenic/
gidugu/
gildadisplay/
giveyouglory/
glassantiqua/
glegoo/
gloriahallelujah/
goblinone/
gochihand/
gorditas/
goudybookletter1911/
graduate/
grandhotel/
gravitasone/
greatvibes/
griffy/
gruppo/
gudea/
gurajada/
habibi/
halant/
hammersmithone/
hanalei/
hanaleifill/
handlee/
hanna/
hannari/
hanuman/
happymonkey/
harmattan/
headlandone/
heebo/
hennypenny/
hermeneusone/
herrvonmuellerhoff/
hind/
hindcolombo/
hindguntur/
hindjalandhar/
hindkochi/
hindmadurai/
hindmysuru/
hindsiliguri/
hindvadodara/
holtwoodonesc/
homenaje/
iceberg/
iceland/
imfelldoublepica/
imfelldoublepicasc/
imfelldwpica/
imfelldwpicasc/
imfellenglish/
imfellenglishsc/
imfellfrenchcanon/
imfellfrenchcanonsc/
imfellgreatprimer/
imfellgreatprimersc/
imprima/
#inconsolata/
inder/
indieflower/
inika/
inknutantiqua/
istokweb/
italiana/
italianno/
itim/
jacquesfrancois/
jacquesfrancoisshadow/
jaldi/
jejugothic/
jejuhallasan/
jejumyeongjo/
jimnightshade/
jockeyone/
jollylodger/
jomhuria/
jomolhari/
josefinsans/
josefinsansstdlight/
josefinslab/
jotione/
judson/
julee/
juliussansone/
junge/
jura/
justmeagaindownhere/
kadwa/
kalam/
kameron/
kanit/
kantumruy/
karla/
karlatamilinclined/
karlatamilupright/
karma/
katibeh/
kaushanscript/
kavoon/
kdamthmor/
keaniaone/
kellyslab/
kenia/
khand/
khmer/
khula/
khyay/
kiteone/
knewave/
kokoro/
kopubbatang/
kottaone/
koulen/
kreon/
kristi/
kronaone/
kumarone/
kurale/
labelleaurore/
laila/
lakkireddy/
lalezar/
lancelot/
laomuangdon/
laomuangkhong/
laosanspro/
lateef/
lato/
leaguescript/
leckerlione/
ledger/
lekton/
lemon/
lemonada/
librebarcode128/
librebarcode128text/
librebarcode39/
librebarcode39text/
librebaskerville/
librecaslontext/
librefranklin/
lifesavers/
lilitaone/
lilyscriptone/
limelight/
lindenhill/
lobster/
lobstertwo/
lohitbengali/
lohitdevanagari/
lohittamil/
londrinaoutline/
londrinashadow/
londrinasketch/
londrinasolid/
lora/
lovedbytheking/
loversquarrel/
loveyalikeasister/
lusitana/
lustria/
macondo/
macondoswashcaps/
mada/
magra/
maitree/
mako/
mallanna/
mandali/
manuale/
manualevfbeta/
marcellus/
marcellussc/
marckscript/
margarine/
markoone/
marmelad/
martel/
martelsans/
marvel/
mate/
matesc/
mavenpro/
mavenprovfbeta/
mclaren/
meddon/
medievalsharp/
medulaone/
meerainimai/
megrim/
meiescript/
mergeone/
merienda/
meriendaone/
merriweather/
merriweathersans/
mervalescript/
metal/
metalmania/
metamorphous/
metrophobic/
miama/
michroma/
milonga/
miltonian/
miltoniantattoo/
mina/
miniver/
mirza/
missfajardose/
misssaintdelafield/
mitr/
modak/
modernantiqua/
mogra/
molengo/
molle/
monda/
monofett/
monoton/
monsieurladoulaise/
montaga/
montserrat/
montserratalternates/
montserratsubrayada/
moul/
moulpali/
mousememoirs/
mplus1p/
mrbedford/
mrbedfort/
mrdafoe/
mrdehaviland/
mrssaintdelafield/
mrssheppards/
mukta/
muktamahee/
muktamalar/
muktavaani/
muli/
myanmarsanspro/
mysteryquest/
nanumbrushscript/
nanumgothic/
nanumgothiccoding/
nanummyeongjo/
nanumpenscript/
nats/
neucha/
neuton/
newrocker/
newscycle/
nicomoji/
niconne/
nikukyu/
nixieone/
nobile/
norican/
nosifer/
nosifercaps/
nothingyoucoulddo/
noticiatext/
#notosans/
#notoserif/
novacut/
novaflat/
novamono/
novaoval/
novaround/
novascript/
novaslim/
novasquare/
ntr/
numans/
nunito/
nunitosans/
nunitosansvfbeta/
nunitovfbeta/
odormeanchey/
offside/
oflsortsmillgoudytt/
oldenburg/
oldstandardtt/
oleoscript/
oleoscriptswashcaps/
oranienbaum/
orbitron/
oregano/
orienta/
originalsurfer/
oswald/
oswaldvfbeta/
overlock/
overlocksc/
overpass/
overpassmono/
overpassvfbeta/
overtherainbow/
ovo/
oxygen/
oxygenmono/
pacifico/
padauk/
palanquin/
palanquindark/
pangolin/
paprika/
parisienne/
passeroone/
passionone/
pathwaygothicone/
patrickhand/
patrickhandsc/
pattaya/
patuaone/
pavanam/
paytoneone/
pecita/
peddana/
peralta/
petitformalscript/
petrona/
phetsarath/
philosopher/
piedra/
pinyonscript/
pirataone/
plaster/
play/
playball/
playfairdisplay/
playfairdisplaysc/
podkova/
podkovavfbeta/
poetsenone/
poiretone/
pollerone/
poly/
pompiere/
ponnala/
pontanosans/
poppins/
portersansblock/
portlligatsans/
portlligatslab/
postnobillscolombo/
postnobillsjaffna/
pragatinarrow/
prata/
preahvihear/
pressstart2p/
pridi/
princesssofia/
prociono/
prompt/
prostoone/
prozalibre/
ptmono/
ptsans/
ptsanscaption/
ptsansnarrow/
ptserif/
ptserifcaption/
puritan/
purplepurse/
quando/
quantico/
quattrocento/
quattrocentosans/
questrial/
quicksand/
quintessential/
qwigley/
racingsansone/
radley/
rajdhani/
rakkas/
raleway/
ralewaydots/
ralewayvfbeta/
ramabhadra/
ramaraja/
rambla/
rammettoone/
ranchers/
ranga/
rasa/
rationale/
raviprakash/
redacted/
redactedscript/
reemkufi/
reeniebeanie/
revalia/
rhodiumlibre/
ribeye/
ribeyemarrow/
righteous/
risque/
rokkitt/
rokkittvfbeta/
romanesco/
ropasans/
rosario/
rosarivo/
rougescript/
roundedmplus1c/
rozhaone/
rubik/
rubikmonoone/
rubikone/
ruda/
rufina/
rugeboogie/
ruluko/
rumraisin/
ruslandisplay/
russoone/
ruthie/
rye/
sacramento/
sahitya/
sail/
saira/
sairacondensed/
sairaextracondensed/
sairasemicondensed/
salsa/
sanchez/
sancreek/
sansation/
sansita/
sansitaone/
sansitavfbeta/
sarabun/
sarala/
sarina/
sarpanch/
sawarabigothic/
sawarabimincho/
scada/
scheherazade/
scopeone/
seaweedscript/
secularone/
sedan/
sedansc/
sedgwickave/
sedgwickavedisplay/
seoulhangang/
seoulhangangcondensed/
seoulnamsan/
seoulnamsancondensed/
seoulnamsanvertical/
sevillana/
seymourone/
shadowsintolight/
shadowsintolighttwo/
shanti/
share/
sharetech/
sharetechmono/
shojumaru/
shortstack/
shrikhand/
siamreap/
siemreap/
sigmarone/
signika/
signikanegative/
simonetta/
sintony/
sirinstencil/
sitara/
sixcaps/
skranji/
slabo13px/
slabo27px/
smythe/
sniglet/
snippet/
snowburstone/
sofadione/
sofia/
sonsieone/
sortsmillgoudy/
souliyo/
sourcecodepro/
sourcesanspro/
sourceserifpro/
spacemono/
spicyrice/
spinnaker/
spirax/
squadaone/
sreekrushnadevaraya/
sriracha/
stalemate/
stalinistone/
stalinone/
stardosstencil/
stintultracondensed/
stintultraexpanded/
stoke/
strait/
strong/
sueellenfrancisco/
suezone/
sumana/
supermercadoone/
sura/
suranna/
suravaram/
suwannaphum/
swankyandmoomoo/
tangerine/
taprom/
tauri/
taviraj/
teko/
telex/
tenaliramakrishna/
tenorsans/
terminaldosis/
terminaldosislight/
textmeone/
thabit/
tharlon/
thegirlnextdoor/
tienne/
tillana/
timmana/
titanone/
titilliumweb/
tradewinds/
trirong/
trocchi/
trochut/
trykker/
tuffy/
tulpenone/
uncialantiqua/
underdog/
unicaone/
unifrakturcook/
unifrakturmaguntia/
unlock/
unna/
unnavfbeta/
vampiroone/
varela/
varelaround/
varta/
vastshadow/
vesperlibre/
vibur/
vidaloka/
viga/
voces/
volkhov/
vollkorn/
voltaire/
vt323/
waitingforthesunrise/
wallpoet/
warnes/
wellfleet/
wendyone/
wireone/
worksans/
yaldevicolombo/
yanonekaffeesatz/
yanonekaffeesatzvfbeta/
yantramanav/
yatraone/
yesevaone/
yesteryear/
yinmar/
yrsa/
zeyada/
zillaslab/
zillaslabhighlight/


-- 
ng0
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