Freeware Converters
Video to Zune:
To Both WMV AND MP4:
Super Video Converter - Powerful customizable converter for basically ALL media types. Includes Zune preset.
MediaCoder - a universal media transcoder which nicely integrates most popular audio/video codecs and tools into an all-in-one solution
Any Video Converter 2.5.6 - onvert almost all video formats including DivX, XviD, MOV, RM, RMVB, MPEG, VOB, DVD, WMV, and AVI to MPEG-4 movie format for PSP or other portable video device, MP4 player, or Smartphones.
Zilla Free Video Converter-Decompiler - Universal Video File Converter-Decompiler for MPEG, MPEG-1, MPEG-2, AVI (Windows Video), WMV (Windows Media Video), ASF & RM (Real Media).
WM Converter 2 - Extremely easy to use video/audio converter provides file conversion with split and merge options for most popular media formats.
Any Video Converter - allows you to effortlessly convert video files between every format, for FREE
Avidemux - Allows for editing videos and re-encoding. Nice if you want to do any touch ups beforehand.
Free Video Converter 1.0 - With Free Video Converter, you can convert your video files into the formats you need (TV, website, Mobile Phone, iPod, Zune ...) [Note: you need to click on the link on the left side of the website to get to the converter]
MediaCell Mobile Video Converter 2.5 - MediaCell Mobile Video Converter Converter introduces unmatchable video compresssion ratio and conversion speed (7 times of the playback).
Free Zune Converter 1 - Very Versitile w/ Batch option. Free Zune Video Converter is a free application which converts the most popular video files (AVI, MPEG, MP4, FLV, or MOV) to Microsoft Zune compatible video format (WMV, MP4).
To Just WMV:
Encode360 - The converter for MS products (XBOX360/Zune). Includes Zune preset
Windows Media Encoder - A powerful tool for converting both live and pre-recorded audio and video to Windows Media Format.
M2PMCEncoderZX - Specifically built for the Zen, but works fantastically for the Zune.
ZuneTvWatcher - Convert Recorded Media from Media Center PC's and other video to Zune
To Just MP4:
Twins Video to iPod-Zune-PSP-3GP - Convert your videos and take them with you on your portable devices (WMV doesn’t work)
DVD to Zune:
Note that most of these involve multiple conversions, but we're going for programs with the least amount possible. Usually, there'll only be two (the riping and the converting).
MobiDVD - Rip DVD for playback on all popular portable video/audio players (iPod, iPhone, Zune, Apple TV, PSP, PDA, Cell Phone, etc).
DVD-WMV - tool to convert from DVD to WMV. DVD-WMV Supports the Windows Media Audio Pro Codec which allows 5.1 audio support.
DVDx - Allows you to rip DVDs to your Zune.
zB provides a tutorial for this software (involves multiple steps).
Handbrake - Open-source, GPL-licensed, multiplatform, multithreaded DVD to MPEG-4 converter, available for MacOS X, Linux and Windows. (Thanks GOW!)
Staxrip - easily convert your DVD's, DVB captures and many more formats into MPEG-4 like DivX, XviD and x264. As a open source application StaxRip is completely free (thanks again, GOW).
E.M. Free DVD Copy - E.M. Free DVD Copy is a free DVD rip and copy software which can Copy DVD to AVI, WMV, MPEG, FLV, Jpeg, etc
Audio Converters:
Free Mp3 Wma Converter - Convert all your Mp3, Wma, Ogg, Aac, M4a, Ac3, Ape, Flac, Wav files
Online Converters:
Note: Not recommended for large files! Good for youtube videos.
Zamzar - Zamzar supports conversion between a wide variety of different file formats.
All To Convert - Our free online video conversion service allows you convert video from web sites like: google.com, youtube.com, break.com, metacafe.com, myspace.com in all known video formats, such as *.3gp *.mp4 *.wmv *.mpeg *.mov *.swf *.avi *.mp3 files.
Media Convert - manner of converting audio files, video, presentation, document, spreadsheet (thanks Greg).
Feel free to recommend you own!
Do NOT post warez/cracked/pirated software!