In case you havn't already heard about it, Pure TI-le is a graphical rpg engine done completely in pure ti-basic, no xlib or omnicalc or whatever asm support programs there are. It doesn't even use pic files (yet). Click on the screenshot below to get a link to its MaxCoderz birthtopic, where you can get the latest info on it.
http://joepnet.com/hosted/maxcoderz/phpBB2/viewtopic.php?t=1512