BEST FREE SOFTWARE'S FOR PLAYING MULTIMEDIA FILES

VLC media player

VLC is a free and open source cross-platform multimedia player and framework that plays most multimedia files as well as DVDs, Audio CDs, VCDs, and various streaming protocols.
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**Simple,mostly Used player

**Supports different Formats like Flv,Mpeg4,Avi etc...

**Free and User Interface

**Speed Operating and good Frame rate also 

DOWNLOAD LINK http://www.videolan.org/

KM PLAYER

KMP is a versatile multi media player which can cover a various different types of contained formats.

Without any separate Codec, you are able to play any media files because KMP has its' own internal Codec. Supported Codec are separated by internal & external. For the sound Codec, KMPlayer supports MPEG1, 2, AAC, WMA 7, 8, OGG & etc. and it additionally supports matrix function/normalizer function when internal sound Codec is being used. Internal Codec gets processed inside of KMPlayer so it’s faster & safer. Also KMPlayer supports all the Codec from ffdshow and it additionally supports MPEG1/2. If you’re a user who finds it inconvenient to install Codec, who has a low CPU computer and/or a user who strives for an excellent multi-media playback player, you’ll be able to modify your environment to a convenient multi-media format by using KMP.

HERE USING KM PLAYER YOU CAN GET MORE VOLUME 

DOWNLOAD LINK http://www.kmplayer.com/

K-Lite Codec Pack

Provides lots of useful functionality, such as:

• Subtitle display
• Hardware accereration (DXVA2 / NVIDIA CUVID / Intel QuickSync)
• Audio bitstreaming
• Video thumbnails in Explorer
• File association options
• Broken codec detection
• and much more!
• DOWNLOAD LINK http://www.codecguide.com/download_kl.htm

GOM PLAYER

GOM is a FREE media player with popular audio & video codecs built-in.

Codec Finder

GOM Player includes many codecs (XviD, DivX, FLV1, AC3, OGG, MP4, H263 and more) so you won't need to install separate codecs for most videos. For those videos that require a separate codec, GOM Player will find one.

Play Broken AVI Files (Patented)

GOM Player's patented technology enables users to view files with broken indexes or that are still being downloaded.

DOWNLOAD LINK : http://www.gomlab.com/eng/