<s>
DC++	B-Language
is	O
a	O
free	B-Application
and	I-Application
open-source	I-Application
,	O
peer-to-peer	O
file-sharing	O
client	B-Protocol
that	O
can	O
be	O
used	O
for	O
connecting	O
to	O
the	O
Direct	O
Connect	O
network	O
or	O
to	O
the	O
ADC	O
protocol	O
.	O
</s>
<s>
It	O
is	O
developed	O
primarily	O
by	O
Jacek	B-Language
Sieka	I-Language
,	O
nicknamed	O
arnetheduck	O
.	O
</s>
<s>
DC++	B-Language
is	O
a	O
free	B-Application
and	I-Application
open-source	I-Application
alternative	O
to	O
the	O
original	O
client	B-Protocol
,	O
NeoModus	O
Direct	O
Connect	O
(	O
NMDC	O
)	O
;	O
it	O
connects	O
to	O
the	O
same	O
file-sharing	O
network	O
and	O
supports	O
the	O
same	O
file-sharing	O
protocol	O
.	O
</s>
<s>
One	O
of	O
the	O
reasons	O
commonly	O
attributed	O
to	O
the	O
popularity	O
of	O
DC++	B-Language
is	O
that	O
it	O
has	O
no	O
adware	O
of	O
any	O
kind	O
,	O
unlike	O
NMDC	O
.	O
</s>
<s>
Many	O
other	O
clients	O
exist	O
for	O
the	O
Direct	O
Connect	O
network	O
,	O
and	O
most	O
of	O
these	O
are	O
DC++	B-Language
"	O
mods	B-Application
"	O
:	O
modified	O
versions	O
of	O
DC++	B-Language
,	O
based	O
on	O
DC++'s	O
source	O
code	O
.	O
</s>
<s>
A	O
partial	O
list	O
of	O
DC++	B-Language
mods	B-Application
is	O
given	O
below	O
.	O
</s>
<s>
music-sharing	O
communities	O
)	O
,	O
or	O
in	O
order	O
to	O
support	O
specific	O
experimental	O
features	O
,	O
or	O
perhaps	O
features	O
that	O
have	O
been	O
rejected	O
from	O
inclusion	O
in	O
DC++	B-Language
itself	O
.	O
</s>
<s>
An	O
example	O
of	O
an	O
experimental	O
feature	O
is	O
hashing	B-Error_Name
,	O
which	O
was	O
initially	O
implemented	O
in	O
BCDC++	O
and	O
later	O
adopted	O
by	O
DC++	B-Language
.	O
</s>
<s>
,	O
DC++	B-Language
had	O
around	O
90%	O
market	O
share	O
of	O
the	O
Direct	O
Connect	O
community	O
.	O
</s>
<s>
An	O
advantage	O
of	O
the	O
free	B-Application
and	I-Application
open-source	I-Application
nature	O
of	O
DC++	B-Language
is	O
that	O
several	O
mods	B-Application
have	O
been	O
released	O
which	O
add	O
features	O
to	O
the	O
original	O
client	B-Protocol
.	O
</s>
<s>
Many	O
users	O
send	O
patches	O
to	O
DC++	B-Language
which	O
are	O
included	O
in	O
future	O
releases	O
,	O
but	O
some	O
features	O
are	O
rejected	O
by	O
the	O
developer	O
.	O
</s>
<s>
Stated	O
reasons	O
for	O
rejecting	O
a	O
patch	O
are	O
because	O
they	O
are	O
coded	O
poorly	O
,	O
or	O
that	O
the	O
feature	O
is	O
frivolous	O
,	O
abusable	O
or	O
overly	O
specialized	O
,	O
and	O
does	O
not	O
belong	O
in	O
the	O
main	O
client	B-Protocol
.	O
</s>
<s>
client/share	O
checking	O
)	O
.	O
</s>
<s>
The	O
developers	O
of	O
some	O
forks	B-Application
contribute	O
features	O
and	O
bug	O
fixes	O
back	O
upstream	B-General_Concept
to	O
DC++	B-Language
.	O
</s>
