mattwellss/magento-composer-autoloader
For folks still playing “wait and see” with Magento 2, (i.e. most current Magento systems), and who are using some sort of Composer workflow (not most Magento 1 systems), this is a small autoloader optimization that fixes Magento 1’s selfish “if I try to load someone else’s class and it doesn’t exist I’ll explode” autoloader.