Mac / iPhone Utils
Kernel Switcher for Mac: http://www.shazron.com/2009/08/31/kernel-switcher-for-mac-os-x-snow-leopard/ (Obj-C)
iAds Plugin for iPhone PhoneGap: http://github.com/phonegap/phonegap-plugins/tree/master/iPhone/AdPlugin/ (Obj-C, Javascript)
PayPal Plugin for iPhone PhoneGap: http://github.com/phonegap/phonegap-plugins/tree/master/iPhone/PayPalPlugin/ (Obj-C, Javascript)