Freeware Video Codec

FFDSHOW 64-bit is a 64-bit compatible video / audio DirectShow decoding filter that can decompress several video formats, including AVC, MP4, Matroska/MKV, DivX, XviD, WMV, MPEG-4, MPEG-1 and MPEG-2 movies..
Download FFDShow (all-in-one codec) 64bit 3851 (20110512) (from Video Codecs)

4.0 MB | For Windows 7, Windows 8 (64-bit, 32-bit) / Vista / XP | Free

The Microsoft Camera Codec Pack enables the viewing of a variety of device-specific file formats..
Download Microsoft Camera Codec Pack 6.3.9723.0 (from Video Codecs)

5.0 MB | For Windows 7, Windows 8 / Vista / XP | Free

If you're the owner of an older Hewlett Packard desktop or laptop PC with an attached optical drive capable of playing DVD files, then HP DVD Play is a required utility which enabled playback of DVD and Blu-ray discs. A review of HP DVD Play has also been published.
Download HP DVD Play 3.7.0.6623 (from Video Codecs)

88.7 MB | For Windows 7, Windows 8 / Vista / XP | Free

AMD Media Codec Package or formerly known as ATI Avivo is a complete set of tools that you will need for converting videos and transcoding..
Download AMD Media Codec Package 11.12 (from Video Codecs)

58.1 MB | For Windows 7, Windows 8 / Vista / XP | Free

The Windows Media Codec Pack, published by Microsoft, is the perfect addition to your PC if you love watching movies yet lack the required codec pack on Windows in order to watch them interruption-free. A review of Windows Media Player 9 Codecs Pack has also been published.
Download Windows Media Player 9 Codecs Pack 1.0 (from Video Codecs)

xvid codec media player 9
0.82 MB | For | Free

DVD Decoder Pack for Windows XP (DVDpack..
Download DVD Decoder Pack 1.0 (from Video Codecs)

391 KB | For Windows 7, Windows 8 / Vista / XP | Free

Huffyuv is a very fast, lossless Win32 video codec. A review of Huffyuv has also been published.
Download Huffyuv 2.1.1 (from Video Codecs)

huffyuv download
15KB | For | Free

Vista Codec Pack is a set of filters and codecs that will allow you to view your favourite video and audio files..
Download Vista Codec Pack 7.2.0 (from Video Codecs)

20 MB | For Windows 7, Windows 8 / Vista / XP | Free

Satsuki Decoder Pack is an audio/video auto-installable filters and decoder for windows 2k/XP/2k3/2k8/vista/seven/8 (French, English)..
Download Satsuki Decoder Pack 5.3.0.0 (from Video Codecs)

18.52 MB | For Windows 7, Windows 8 / Vista / XP | Free

AVIcodec is a small utility which can display which codecs are required in order to watch video files or listen to audio. A review of AVIcodec has also been published.
Download AVIcodec 1.2.113 Beta (from Video Codecs)

577 KB | For Windows 7, Windows 8 / Vista / XP | Free