Probably all of you know the Nik Collection, a series of well-known effect plugins for Adobe Photoshop. After buying it from Nik Software Google offered the whole package for USD 150, a very attractive offer. But now Google even gives the whole package away for free including Analog Efex Pro, Color Efex Pro, Silver Efex Pro, Viveza, HDR Efex Pro, Sharpener Pro and Dfine. It can be downloaded without further restrictions here.