Instan-t Messenger 5.0 is a free instant message client from Interactive Networks that allows you to sign into MSN, Googletalk, ICQ/AOL, and Yahoo all at same time.
Simply download Instant-t, create a username and then add your username and password for your other messenger accounts and every time you sign in with Instant-t, you will sign in to your other accounts as well. Along with allowing this cross-platform chat, Instan-t also supports multiperson video chat with friends on any IM network. Lastly, Instan-t is entirely free to use and contains no advertising or spyware giving you the best of both worlds.
Instan-t.com In Their Own Words
“New features of Instan-t v5.0 include: New multiperson video chat, Interoperability with Google Talk, Multiple ways to see your contact list, Support for tabs in message windows, Contact list search, Rename contacts on all networks, Display picture, Custom status text, Webcam as display picture, Improved toaster (online notification), New skins (Classic and Dusk)”
Why Instan-t.com It Might Be A Killer
While this is not the only multi-platform instant messenger service it is a good one that supports cross-platform multi-video chat. Nobody wants to be limited to one IM network and Instan-t should be a popular choice amongst those wishing to expand their communication options.
Some Questions About Instan-t.com
One feature that seems to be lacking from all of these cross-platform IMs is the ability to log-in to multiple accounts from the same IM service at the same time. For example, someone with multiple MSN accounts might want to be signed in with them all at the same time. Could they develop this functionality? 
