Larry Page had said that software companies don't have to pay Google to be included in the bundle, when Google Pack was released in January 2006. In addition to Google’s own software, the pack also bundled: “Adobe Reader 7, Ad-Aware SE Personal, Norton AntiVirus 2005 Special Edition, RealPlayer, Trillian, StarOffice and more”.
After removing Trillian and Ad-Aware, last week Google removed StarOffice from Google Pack and one of the possible explanations is that Sun signed an agreement with Microsoft to bundle MSN Toolbar with Java downloads. A Google representative told eWeek: "We are constantly evaluating which products to include in Google Pack to make it more valuable to users. At this time the agreement to distribute StarOffice through Google Pack has expired, and we have decided with Sun not to renew the agreement."
Source:→ Google System