Poe
Poe is a small, fast, flexible scripting language.
...Poe is a toy language that is not, and will never be, suitable for production use. However, writing the language was a fantastic academic exercise and the source code is available freely as a reference to anyone who may be interested.
The entirety of the source code was written by me, Ricky Stewart, with the exception of the parser which is generated from Flex/Bison.