G'MIC (GREYC's Magic Image Converter) is a tool that comes with a lot (more then 190) of pre-defined image filters and effects for GIMP and is available for Window, Linux and Mac OSX.
In today's Ubuntu Newbie Guide part I'm going to tell you about running the Metacity Compositing Manager instead of Compiz Fusion. Why you would want to do that? Because it uses less resources and it may run better for old or incompatible video cards (including Intel). You don’t even need accelerated graphics to run Metacity with compositing and it even works well inside VirtualBox.