Jikes RVM (Research Virtual Machine) provides a flexible open testbed to prototype virtual machine technologies and experiment with a large variety of design alternatives. Jikes RVM runs on many platforms and advances the state-of-the-art of virtual machine technologies for dynamic compilation, adaptive optimization, garbage collection, thread scheduling, and synchronization. It is self-hosted, i.e. its Java code runs on itself without requiring a second virtual machine. Most other virtual machines for the Java platform are written in native code (typically C or C++). A Java implementation provides ease of portability and a seamless integration of virtual machine and application resources such as objects, threads, and operating-system interfaces.
teeterl is a lean, portable implementation of Erlang. teeterl starts from a single executable file without any additional harness. teeterl is built using Apache Portable Runtime, a library tested on dozens of OSes and their flavors. teeterl borrows from industry-standard Erlang/OTP, especially when it comes to compiler front-end. teeterl provides the concurrency power of Erlang without any telecom cruft.
xNBD is yet another NBD (Network Block Device) server program, which is fully compatible with the NBD client driver in the Linux kernel. In comparison with the original NBD server, it provides possibly better I/O performance by using mmap(), concurrent access from multiple clients, distributed Copy-on-Write disk, and live storage migration for virtual machines.
The Supernova programming language is a modern scripting language and the first one that presents the concept of programming with direct fiction description using a clear subset of pure human language. It is easy for users with no programming experience. It is not sensitive to case, spaces, tabs, or line breaks. It support GUI programming. The source code can be written in a mixture of Arabic and English. It lets you distribute directly executable application files. It lets you use the Windows API and call DLL functions. It includes libraries for sound playing, sound recording, and movie playing. It includes commands for text processing, date and time processing, multi-dimension arrays, and file I/O. Its documentation includes many samples and tests.
pyvm3 is a hobby project that's based on a compact virtual machine that can run Python bytecode and supports classic Python and whitespaceless Python frontends. On top of this there are implementations of various applications like a Web browser, PDF viewer, font rasterizer, SSH, PGP, a windowing environment on linuxfb, a video/MP3 player, and more.
sVimPy is a very small Python virtual machine intended for use in microcontroller projects. At the moment, it supports about 3/4 of all opcodes used in python3k. Most data types are supported. The intended goal is to use this VM in environments like Atmel's ATmega chips (2-8kb RAM). The microcontroller bootloader is still missing (no arduinos left for experimentation). Classes are not supported. Features include: function calling, a stack based VM, garbage collection, very low memory usage, an interactive debugging console, dictionaries and tuples, iterations, VM single stepping (game loop usage is possible), C function calling, a small memory footprint, fast performance, the ability to be used as a library in other projects, a simple API + code, possible usage as a small deployment executable for Python projects.