Oracle PL/SQL to pg/PSQL conversion documentation.

Ideally I would like to see some template/example documentation of common feature conversion solutions. For example, "If you have a pl/sql TABLE function, you can do the same thing in postgres this way ..." I can generally Google specific problems and after enough time weeding out the garbage, I can usually find what I want, but maybe somebody has it all in one nice neat document and I just don't know about it.