The Apple Downloads pages lists extra effects under iChat and email as the same effects work in both iChat and PhotoBooth. There are several other websites offering brilliant Photo Booth effects to download. My favorite is Cat Eye, which has lots of trippy effects (requires Leopard). Another good one is Macpoupou Factory's More iChat Effects (when you click the link provided below this answer you must click "Download" on the sidebar, where More iChat Effects 2.0.4 should be the second link listed). More iChat Effects is also Leopard only. Another option is AlterEgo iChat Effects. This download has a nice selection, although unfortunately the majority of the effects are emblazoned with a logo right across the middle where your face should be. It's an option, but I honestly ended up deleting most of them. Next there's a neat little effect called Obamify, for those who want to mock up an image of themselves reminiscent to an Obama campaign poster. It is only one effect, but it's nifty. Finally, for those who are really scraping the barrel for crazy new Photo Booth effects, you can visit the QuartzFX website. In the downloads category you will find a handful of user-created Photo Booth effects, some which work better than others. If you go to the "How-to" section there are also tutorials on how to create your own effects. *Final Disclaimer- For those who are confused, iChat Effects are the same as Photo Booth Effects. Have fun! (links are listed under this answer)
There is no version of iChat for Linux.
iChat uses the AIM network so to talk to people without iChat they will need to be on the AIM network. (See links below) .
ichat cost $29.00 to buy!!
Apple does not make iChat for iPad. But if you have an iPad 2 or newer, you can use FaceTime which is very similar to iChat.
"You cannot use ichat for Windows. Ichat is used with Mac, but you can use AIM with Windows and comunicate with Ichat on Mac. You will also need internet."
There is support for iChat on the Apple website, under the support option. They offer support for iChat when it quits unexpectedly, when the video chat is not working, and if you are unable to invite while in iChat.
In iChat, go to the top menu bar. Click "iChat" on the menu bar and then click "Change My Profile".
The Dakota font may not be supported by iChat, or there may be compatibility issues between the font and the iChat software. It is recommended to use a font that is known to be compatible with iChat for better performance.
most likely all macs come with ichat
open ichat. click 'ichat' and then 'preferences' then click 'accounts' there should be a + sign, click that to make a new account
iChat uses the AIM network so a Windows user with an AIM account (See links below) will be able to contact a Mac user with iChat.