K-Lite Mega Codec Pack combines the contents of three codec packs: K-Lite Codec Pack Full, QuickTime Alternative, and Real Alternative. It also includes some extra features: BSplayer and ffdshow.

Contents of version 3.8.0:

Player:
Media Player Classic [version 6.4.9.1 rev. 40]

ffdshow:
ffdshow [revision 1872]
ffdshow VFW interface
extra plugins

DirectShow video decoding filters:
XviD [version 1.2.0-dev build 2008-01-10]
DivX [version 6.8.0.0]
On2 VP6 [version 6.4.2.0]
On2 VP7 [version 7.0.10.0]
MPEG-2 (Cyberlink) [version 8.1.0.1317]
MPEG-2 (Gabest) [version 1.0.0.4]
MPEG-1 (MainConcept) [version 1.0.0.78]

DirectShow audio decoding filters:
AC3/DTS/LPCM (AC3Filter) [version 1.46]
Vorbis (CoreVorbis) [version 1.1.0.79]
AAC (CoreAAC) [version 1.2.0.575]

DirectShow audio parsers:
MusePack (MONOGRAM) [version 0.9.1.2 | 0.3.1.2]
WavPack (CoreWavPack) [version 1.1.1]
FLAC (madFLAC) [version 1.7]
Monkey's Audio (DCoder) [version 1.0]
OptimFROG (RadLight) [version 1.0.0.1]
DC-Bass Source [version 1.1.0.0]
AC3/DTS Source (AC3File) [version 0.5b]
AMR (MONOGRAM) [version 0.9.0.1]

DirectShow source filters:
AVI splitter (Gabest) [version 1.0.0.9]
AVI splitter (Haali Media Splitter) [version 1.7.401.3]
MP4 splitter (Haali Media Splitter) [version 1.7.401.3]
MP4 splitter (Gabest) [version 1.0.0.4]
Matroska splitter (Haali Media Splitter) [version 1.7.401.3]
Matroska splitter (Gabest) [version 1.0.3.0]
Ogg splitter (Haali Media Splitter) [version 1.7.401.3]
Ogg splitter (Gabest) [version 1.0.0.1]
MPEG PS/TS splitter (Gabest) [version 1.0.0.4]
MPEG PS/TS splitter (Haali Media Splitter) [version 1.7.401.3]
FLV splitter (Gabest) [version 1.0.0.4]
 DDA Reader (Gabest) [version 1.0.0.2]
CDXA Reader (Gabest) [version 1.0.0.2]

DirectShow subtitle filter:
DirectVobSub (a.k.a. VSFilter) [version 2.38]
DirectVobSub (a.k.a. VSFilter) [version 2.33]

Other filters:
Haali Video Renderer [version 1.7.401.3]

VFW video codecs:
XviD [version 1.2.0-dev build 2008-01-10]
DivX Pro [version 6.8.0.14]
x264 [revision 736bm]
On2 VP6 [version 6.4.2.0]
On2 VP7 [version 7.0.10.0]
Intel Indeo 4 [version 4.51.16.2]
Intel Indeo 5 [version 5.2562.15.54]
Intel I.263 [version 2.55.1.16]
huffyuv [version 2.1.1 CCE Patch 0.2.5]
I420 (Helix) [version 1.2]
YV12 (Helix) [version 1.2]

ACM audio codecs:
MP3 (Fraunhofer) [version 3.4.0.0]
MP3 (LAME) [version 3.97]
AC3ACM [version 1.4]
Vorbis [version 0.0.3.6]
DivX ;) Audio [version 4.2.0.0]

Real Alternative:
RealMedia codecs [version 6.0.12.1662]
RealMedia plugin for Internet Explorer
RealMedia plugin for Firefox/Mozilla/Netscape/Opera
RealMedia DirectShow splitter [version 1.0.1.2]

Tools:
Codec Tweak Tool [version 2.2.5]
GSpot Codec Information Appliance [version 2.70a]
MediaInfo Lite [version 0.7.5.9]
VobSubStrip [version 0.11]
GraphEdit [build 061102]
Haali Muxer [version 1.7.359.22]
FourCC Changer
Bitrate Calculator