Source: ibm.com

An overview about the leading collaboration solutions. 

Engage anytime, anywhere with employees, customers and citizens
IBM enterprise social software provides business collaboration capabilities including communities, profiles, file-sharing, blogs, wikis, bookmarks, content management, IM, online meetings, audio and video chat, email, calendaring and more. Delivered on cloud, on premises or as a hybrid, it integrates with what you have today—and will have tomorrow.

Take a look at the comparison here