Yoshihiro Shindo has blogged about "Spark project" in English.

"Spark project" is a Japanese OpenSource ActionScript Community. There are many awesome libraries such as:

ASReflect

ASReflect is a Java-like reflection library that wraps flash.utils.describeType.

E3Engine

An ECMAScript(3rd) engine written in ActionScript2. This engine enables us to execute "eval()" dynamically.

swfassist

swiffassist can dynamically generate SWF binaries on ActionScript3. This library may change the world!?

Thread

'Thread' helps us write asynchronous processing in ActionScript3.

The details are given in his entry. Let's check it now!