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

[detail level 123]

► cachedb
cachedb.c
cachedb.h
redis.c
redis.h
► daemon
acl_list.c
acl_list.h
cachedump.c
cachedump.h
daemon.c
daemon.h
remote.c
remote.h
stats.c
stats.h
unbound.c
worker.c
worker.h
► dns64
dns64.c
dns64.h
► dnscrypt
cert.h
dnscrypt.c
dnscrypt.h
► dnstap
dnstap_fstrm.c
dnstap_fstrm.h
dtstream.c
dtstream.h
unbound-dnstap-socket.c
► dynlibmod
► examples
helloworld.c
dynlibmod.c
dynlibmod.h
► edns-subnet
addrtree.c
addrtree.h
edns-subnet.c
edns-subnet.h
subnet-whitelist.c
subnet-whitelist.h
subnetmod.c
subnetmod.h
► ipsecmod
ipsecmod-whitelist.c
ipsecmod-whitelist.h
ipsecmod.c
ipsecmod.h
► ipset
ipset.c
ipset.h	Ipset.h
► iterator
iter_delegpt.c
iter_delegpt.h
iter_donotq.c
iter_donotq.h
iter_fwd.c
iter_fwd.h
iter_hints.c
iter_hints.h
iter_priv.c
iter_priv.h
iter_resptype.c
iter_resptype.h
iter_scrub.c
iter_scrub.h
iter_utils.c
iter_utils.h
iterator.c
iterator.h
► libunbound
context.c
context.h
libunbound.c
libworker.c
libworker.h
unbound-event.h
unbound.h
worker.h
► pythonmod
pythonmod.c
pythonmod.h
pythonmod_utils.c
pythonmod_utils.h
► respip
respip.c
respip.h
► services
► cache
dns.c
dns.h
infra.c
infra.h
rrset.c
rrset.h
authzone.c
authzone.h
listen_dnsport.c
listen_dnsport.h
localzone.c
localzone.h
mesh.c
mesh.h
modstack.c
modstack.h
outbound_list.c
outbound_list.h
outside_network.c
outside_network.h
rpz.c
rpz.h
view.c
view.h
► sldns
keyraw.c
keyraw.h
parse.h
parseutil.c
parseutil.h
pkthdr.h
rrdef.c
rrdef.h
sbuffer.c
sbuffer.h
str2wire.c	Str2wire.c - read txt presentation of RRs
str2wire.h	Str2wire.h - read txt presentation of RRs
wire2str.c
wire2str.h	Wire2str.h - txt presentation of RRs
► smallapp
unbound-anchor.c
unbound-checkconf.c
unbound-control.c
unbound-host.c
worker_cb.c
► testcode
asynclook.c
checklocks.c	Testcode/checklocks.c - wrapper on locks that checks access
checklocks.h	Testcode/checklocks.h - wrapper on locks that checks access
delayer.c
fake_event.c
fake_event.h
lock_verify.c
memstats.c
perf.c
petal.c
pktview.c
readhex.c
readhex.h
replay.c
replay.h
signit.c
streamtcp.c
testbound.c
testpkts.c
testpkts.h
unitanchor.c
unitauth.c
unitdname.c
unitecs.c
unitldns.c
unitlruhash.c
unitmain.c
unitmain.h
unitmsgparse.c
unitneg.c
unitregional.c
unitslabhash.c
unitverify.c
► testdata
► speed_cache.tdir
makeqs.c
► util
► data
dname.c
dname.h
msgencode.c
msgencode.h
msgparse.c
msgparse.h
msgreply.c
msgreply.h
packed_rrset.c
packed_rrset.h
► shm_side
shm_main.c
shm_main.h
► storage
dnstree.c
dnstree.h
lookup3.h
lruhash.c
lruhash.h
slabhash.c
slabhash.h
alloc.c
alloc.h
as112.c
as112.h
config_file.c
config_file.h
edns.c
edns.h
fptr_wlist.c
fptr_wlist.h
locks.c	Util/locks.c - unbound locking primitives
log.c
log.h
mini_event.c
mini_event.h
module.c
module.h
net_help.c
net_help.h
netevent.c
netevent.h
random.c
random.h
rbtree.c
rbtree.h
regional.c
regional.h
rtt.c
rtt.h
tcp_conn_limit.c
tcp_conn_limit.h
timehist.c
timehist.h
tube.c
tube.h
ub_event.c
ub_event.h
ub_event_pluggable.c
winsock_event.c
winsock_event.h
► validator
autotrust.c
autotrust.h
val_anchor.c
val_anchor.h
val_kcache.c
val_kcache.h
val_kentry.c
val_kentry.h
val_neg.c
val_neg.h
val_nsec.c
val_nsec.h
val_nsec3.c
val_nsec3.h
val_secalgo.c
val_secalgo.h
val_sigcrypt.c
val_sigcrypt.h
val_utils.c
val_utils.h
validator.c
validator.h
► winrc
anchor-update.c
unbound-service-install.c
unbound-service-remove.c
w_inst.c
w_inst.h
win_svc.c
win_svc.h
unbound.h