I like this engine but also is limited. Anyway this come today with some features:
We're excited to share today's big news: this morning we launched Corona SDK Starter, a completely free version of your favorite development platform. With the debut of Corona SDK Starter, we're eliminating any and all barriers in mobile development, and encouraging more developers to join the mobile revolution.
Corona Enterprise adds the ability to call any native Objective-C and Java library , you can read more about this here.