SnoopyPfeffer/Mod-PayPal - GitHub. I should take a closer look at this, as it allows you to use PayPal as a money module in OpenSim. It might be interesting if I ever want to revive and share my OpenSim projects again. It is based on OpenSim 0.7.1, so I can only try it out when the new Diva D2 is released (which is already in the works).