GIMP Plugin Registry is a collection of hundreds of plugins for GIMP which includes GIMP FX Foundry (a huge collection of scripts for GIMP), Liquid-Rescale, Safe For Web, Separate+, Elsamuko (which includes effects such as “Obama Hope”, “Movie 300”, antique photo border and more), Warming and Cooling Filters and others.
To install GIMP Plugin Registry for GIMP 2.8 in Ubuntu 12.04 or 11.10, use the commands below:
sudo add-apt-repository ppa:otto-kesselgulasch/gimp
sudo apt-get update
sudo apt-get install gimp-plugin-registry