I'm fairly familiar with VSTs, Ableton, and similar stuff. But all of those require some configuration/setup. The flexibility allows you to build complex systems, but I'm looking for a "gallery" of virtual audio machines (think of guitar pedals for example) that I just download and immediately start jamming with (on a connected microphone, guitar, or MIDI controller).
This doesn't require any kind of standard -- it could be implemented on a variety of platforms, for example Ableton Live.
So are there any websites where I can look for "ready to use" tools like this?