This is a great summary of the pulse of the Sharepoint community, and the real issues they struggle with. Worth mentioning in the Full-suites and Replacement category is OpenText. OpenText provides integrations to Sharepoint for breaking down document silos, preventing database bloat and most importantly is the ability to provide best-of-breed web content management and robust, social compliance features around making blogs, wikis and forums safe for enterprise adoption.

http://www.opentext.com/2/sol-products/sol-pro-extensions-microsoft.htm