Get flash to fully experience Pearltrees
Paint.NET is a freeware image editing application which includes a number of effects built in ( see here for details ) Paint.NET also allows plugins which affect the image or allow special file types to be opened and saved. There are currently hundreds of plugins available so knowing where to start is quite difficult. This site aims to give a quick idea of what plugins are available.
As part of the move to a component architecture , Trac 0.9 is now extensible via plugins. Plugins can be used to add functionality to Trac that was not previously possible without extensive modification to the source. This could include anything from extended milestone facilities, multi-project functionality, integration of automated build systems, other link types, to simple macros.