skype or pidgen both of which are also available for Apple Macs. AOL's AIM software uses the same systems as iChat. (See links below)
"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."
No
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.
yes but not for windows
>There is no version of iChat produced for Windows. However, you can use other instant >messenger clients such as Pidgin to chat, even with people using iChat. You can use Jabber to connect to MS/Live Messenger or Yahoo Messenger from iChat. In fact I got it working to connect to my FaceBook friends.
Yes
There is no Windows version of iChat yet but if the Windows user is using an AIM account then you can connect to the Mac iChat user if they are logged into iChat via an AIM account. Otherwise iChat will not work. You can also connect both users via a free online video/chat application similar to Skype, it's a very useful free video/chat application that cross's both Windows and Macs well.
You cannot use the program iChat. However, you can use other instant messenger clients such as Pidgin to chat, even with people using iChat.
Apple's iChat software only works with their Macintosh computers and is not available for computers running the Windows operating system.
http://www.sightspeed.com/
A program like "iSubtitle" for windows would be Windows Media Player. The current version of the Windows Media Player has an option to subtitle nearly any movie the program can play.
iChat on her iMac.