you can't
The iPhone OS 4.0 will be available to iPhone and iPod Touch owners for download through iTunes during the summer of 2010.
You can search iPod firmware on Google, it should be the first link.
UBUNTU
it is illegal to do this
Not all. Apps in the Store list the OS that they support.
IrfanView is free software that is compatible with OS products. You can download this software for free online from websites such as Cnet and FileHippo.
Almost all the linux OS's are free you can find them at their websites .
You can download a free trial of the software suite for Mac OS from the Microsoft website for Mac compatible products here:.microsoft.com/mac/products This however, is a free trial only, valid for 30 days. After which, you'll have to purchase a license from Microsoft.
Download Limewire's free version for your computer and you can download all music for free, it also has videos you can download etc. But the police did a sherch on this website OS be VERY VERY careful.
Chromium OS is free and open source! That does not mean, however, that Chromebooks are free.
http://www.rarlab.com/download.htm Select English and OS
In order to make an iPod touch or iPhone application you need Mac OS in order to download and use the iPhone Software Development Kit (SDK). This software is only available for Mac OS. In order to distribute your App in the App Store you must be part of the developer program which has an annual fee. Incorrect. You can make apps for free and still put it on the store. I do it for a living.