Maas-Maarten Zeeman has been developing Bibble plugins for quite some time now. His plugins can be found here.
However, those are still for the "vintage" Bibble 4 and only recently he has picked up the pace to port them to Bibble 5.
First plugin is Color Popper. It makes your colors.. well, *pop*.
And another one:
Pretty cool eh!
Be aware the plugins for Bibble 5 aren't yet available for the public, but I bet it won't be long! :-)