The Million Tile Engine Beta is now available for purchase.
The Million Tile Engine is a Lua library which was designed with one goal in mind: to allow you as a developer to build enormous tile maps in Tiled and run them at full speed on almost any device. MTE is blazing-fast, regardless of map size. It also features powerful integrated function calls for performing many common tasks such as moving sprites, altering the tile map, accessing Tiled objects and properties, and more. The enormous world maps and platforming stages we’ve yearned to create are finally within easy reach.
http://forums.coronalabs.com/topic/33119-million-tile-engine-beta-release/?p=171559
J. A. Whye gave me permission to post this here.