Chat & Instant Messaging (450 programs)
Pros: Adds hotlinks to Skype contacts within a document. Send Office documents instantly via Skype. Provides quick communication with the author of a document.
Cons: Doesn't integrate with Outlook.
Pros: Easy to use interface. Tons of features. Excellent video and collaboration tools. Well thought out ecosystem.
Cons: Chat feature could be more fleshed out. Only available with certain versions of Office.