Open Source OpenBSD Interpreters

newLISP for BSDs, LINUX, MacOS X, SunOS and Win32: small, fast 350+ functions, a -C-, MySQL, PostgreSQL, SQLite, ODBC, TCP/IP, UDP, XML, Java interface, string processing, regular expressions , math, financial, statistical functions, Win32 DLL

DaVinci Concurrente es un lenguaje orientado a la enseñanza de la programación estructurada para fortalecer los cimientos base de su aprendizaje, tanto en la etapa inicial de la programación secuencial como en la introducción a los conceptos básicos de la programación concurrente. Permite la visualización de la ejecución a través de una ciudad en la cual se puede controlar uno o más robots. Cada robot puede realizar diferentes acciones (por ejemplo tomar flores en la intersección que se encuentra).

Bean Sheet is an interpreted Java spreadsheet. At its core is Bean Shell, an open source Java interpreter. The potential of marrying a Java interpreter with a spreadsheet allows a single document to be a powerful application in its own right.

Zoso is a contextual programming language. Contexts speed software development by allowing you to use "mini-languages" that are optimized for specific tasks in a single source code file.

baffle Is an extension to BF language (https://esolangs.org/wiki/brainfuck), which itself in turn is a extension of Turing machine. baffle extends BF by adding a stack, support for procedures, adding more arithmetic instructions, and a register. baffle can run original BF programs, and while it's not the fastest implementation of BF, but it's written in such a way that makes it easier to replace the instruction set, and to write similar languages. Every cell is a single byte, and the tape wraps.

this is a preprocessor to provide a "national lang support" before the compile-time and then save a lot of run-time. it initially intended to process websites to multiply it with the number of human langs but it is simple enough to use more generally