Corasworks Workplace Suite - great toolset
I have used CorasWorks components at a few clients including one of the largest pharmaceutical companies in the world. There is really no other product out there that allows you to increase the value of collaboration on top of SharePoint like CorasWorks. One of their best components that I really like is their ability to create new roll up web parts on the fly without writing a single line of code. You can roll up data from multiple lists across multiple sites (not just out of the box SharePoint lists and libraries, but customized lists too) and present it on a single page with different grouping and sorting options. You can also very easily color code your data. They have a lot of useful site templates too. One of my favorites is the help desk template that allows me to implement a support site in a matter of minutes.