Imo is a popular online instant messaging tool that enables you to sign on to the main IM networks and chat with your buddies right from your web browser.
But if even in the Web 2. 0 era you still prefer good old desktop apps, you may use the desktop Imo as well. This special version is just an adaptation from the original online Imo to a standard Windows application.
To be honest, Imo is quite limited compared to other popular IM clients. It's got quite a plain interface, no support for emoticons and no customizing options for fonts, colors and other settings that we find in similar applications.
But I have to admit that it does its job just fine: you can connect to the most popular IM networks (MSN, Yahoo, Gtalk amd AIM) from one single interface and talk to any of your friends, whether they belong to one or another network.
If you need to talk to people on more than one IM network, Imo does the trick, but bear in mind that it offers no extended functionality such as emoticons, colors and other goodies.