Mecrisp is an implementation of forth for the TI MSP430 and various members of the ARM family. It is written in the general spirit of ANS which urges the implementor to do what makes sense for their tasks and users.
The forth language was invented by Charles H. Moore in 1968-1970 to provide a means for conveniently programming the radio telescope at Kitt Peak. From that beginning, forth has become a popular language for implementing embedded systems as well as other tasks.
Chuck once wrote that he considered 4k word system quite adequate for most tasks. This is approximately what is available on the G2553 chip.
Much more information about forth can be found at:
A set of exercises with the G2553 LaunchPad are here
A set of exercises with the STM32F4Discovery are here
The wiki uses Markdown syntax