Shoutbox

So they allow developers to enhance the Skype experience but they can't modify the interface. Yeah. That makes sense D: But still:
"Without the prior written consent of Skype"
Did anyone here ask them about adding any features?
Either way, it's arguable whether tabbed windows really modify the interface at all. I mean, taskbar items can already be grouped within Windows, and the tabs themselves aren't actually inside the Skype windows. Seems to be an entirely external experience if you ask me, one worth discussing, or at least asking the people behind the program about.

In any case, these terms specifically apply to usage of their desktop API, so any third party program that accomplishes the task without using it should be fine, particularly because it doesn't alter any of Skype's files in any way. I would imagine this would also mean that if someone were to write a small exe to tab Skype chat windows specifically, without using that API, and put it in with the rest of Skype Plus, it wouldn't be an issue... unless they specify program packages as a whole, or something.

Oh, and, this also raises questions about that Linux project that adds tabs to Skype. That's been around for a long time and nobody's taken it down or anything. Do these terms only apply to Windows versions of Skype, or is there some other reason? Maybe they didn't use the desktop API either (if they even have a Linux variant), like those other two programs, which would only prove my point further.

Let's not forget the fact that the other two programs I found don't have any terms disallowing their use with Skype. If it was really that much of a problem, surely Skype would've noticed their existence by now and forced them into modifying their programs to disable their use with Skype, yes? Windows Tabs has been around for at least a year, and Wintabber at least 3, so, if they haven't been modified by now, clearly Skype has no issue with either. There's no excuse for a company like them, especially under Microsoft, to miss coming across either of these for so long, no matter how obscure they may be.