an expressive, minimalistic, elegant programming language implemented in ANSI C. With cooperative thread concurrency at it's core, async I/O, and influences derived from languages such as Lua, io, Python, and Ruby

Interesting thread.

"a VM designed for and written in the Java(TM) Programming Language with an emphasis on leveraging modular design, and code reuse to achieve flexibility, configurability, and productivity for academic and industrial virtual machine researchers"

summary: YARV is fast.

scalable computing, Amazon style