I use Pidgin on all my desktop computers because it's completely cross-platform (even Linux) and really like it. Unfortunately they don't have a mobile app. Is there a mobile chat client that allows you to add accounts from multiple protocols (AIM, GTalk, MSN, ICQ, etc.) and DOESN'T require you to create a separate account for their service first? I've tried Trillian and IMO, but both want me to create an account for their service before I can add my other accounts.
IM apps that don't require an additional account tend to be few and far between on Android (in my experience, anyway), but so far I've seen two: