K-Lite Codec Pack is a popular, free collection of DirectShow filters, VFW/ACM codecs, and tools that can run on almost all versions of Microsoft Windows (XP, Vista, 7, and 8 - both platforms 32 and 64-bits editions)....
LAV Filters is an Open Source set DirectShow filters that allow you to play all popular video and audio formats without having to install any other codec pack or additional codec or filter....
