Free Video Converter

Super (Windows) ★★★
Support various video formats for input or output without video editing function.
SUPER is universal as it supports a wide variety of input and output files format to encode.
Supported video and audio formats are: 3gp, 3g2, amv, asf, avi, dat, flv, m2t, mkv, mpg, mov, mp4, ogg, rm, rmvb, swf, vob, wmv, aac, ac3, amr, mp2, mp3, ra, wav, wma etc. Customizable resolution, frame rate, and bit rate are supported. You can still launch a batch task. It maybe the best free video converter for windows user.
But its conversion function is very limited. There are many problems with converted video, even cannot be played sometimes. Its user interface is so discursive that it hard to handle. And it does not have any video editing function.

Download: http://www.erightsoft.com/SUPER.html

Videora iPod Converter (Windows) ★★

Convert video to mp4 format for iPod
Videora iPod Converter is a free iPod video converter that converts video files, YouTube videos, movies and DVD's so you can play them on your iPod. The software, developed by the creators of Videora, can convert all popular video files into the proper video formats (MPEG-4, H.264) for any type of iPod that plays video.
It looks like a multi-window browser and very inconvenient to use. Video editing and customization are not supported. The quality of converted video is also not good enough. And there are tons of ads, which is really annoying.

Download: http://www.videora.com/en-us/Converter/iPod/download.php

iSquint (Mac OS X) ★★★
Only support converting video for iPod on Mac OS X.
iSquint is an iPod video conversion app for Mac OS X 10.3.9 or later. It works with almost all popular video formats. And it's also really easy, just drag in your file, and click Start. You can also choose "TV" or "iPod" size, set your quality. On a 1GHz G4, iSquint can convert most video files to iPod-screen-sized videos in real time.
As simplified version of Visualhub (shareware), it only converts video to iPod, without any video editing function, even customize resolution and bit rate.