FMTK Lua Environment
The Lua runtime is LuaJIT 2.1 which is build on Lua 5.1 with some forward compatibility features.
By default the following standard Lua packages are available:
base
bit32
coroutine
debug
ffi
io
jit
math
os
package
string
table
utf8
For a quick introduction to Lua check out the Learn X in Y minutes page on Lua.