You can download CodeRay, it's free:

• via RubyGems (the latest stable version)
• via Subversion
• Older versions can be obtained from RubyForge.

There's also some stuff available:

• the Official Banner ("highlighted by CodeRay")
• the CodeRay Logo in desktop size (for your desktop, maybe?) with famous glass effect background in only 90.24 KB!

Anyone using these? I don't think so ^^