1)   K-Lite Codec Pack 3.1.5
K-Lite Codec Pack is a collection of codecs and DirectShow filters. Those components are needed for encoding and decoding various audio and video formats. This Codec Pack is designed as a user-friendly solution for playing all your movie files.

 2)   CodecInstaller 2.6.1
detect which Audio&Video codecs are installed on your system and suggest you to install the most popular ones. Analyze avi files and discover which codecs are needed and get a lot of info about the file. Easy to use interface.

 3)   Elecard AVC Streaming PlugIn for WMP 1.2
AVC Streaming Plugin for WMP is the package of components for receiving and decoding media data from network (UDP, RTP over UDP, TCP, RTP over TCP) with the RTSP protocol support. The plugin allows decoding of AVC/H.264 video.