"Freeware and open source. (source included with the download). The zipped download is 259kb and includes the interpreter, documentation, and over 80 examples. The unzipped IDE/interpreter exe is 274kb. (it's been growing as I add features). Exe doesn't write anything to system registry. (just uses Windows api). Exe will run on it's own without any of the includes files.
The IDE automatically regenerates it's help file in the same directory."