Plugins? mainly FX?

hey guys hows it going

just out of curiousity, where can i get plugins that people have created for tracks such as compression,distortion,delay, flange etc?

it seems ardour doesnt come with these by default! although me being me, im more than likely wrong!

any help would be appreciated.

http://ardour.org/manual/mixing/plugins

http://www.ladspa.org/

thank you for this!