Google's implementations in Chrome are virtually always released as open specifications.

Dart: http://www.dartlang.org/docs/spec/ SPDY: http://dev.chromium.org/spdy/spdy-protocol WebRTC: http://dev.w3.org/2011/webrtc/editor/webrtc.html NaCL: https://developers.google.com/native-client/reference/pepper... (C API definition)

In addition to open specifications, as the parent pointed out, they also have open source reference implementations. At least in the cast of SPDY, support has already landed in Firefox. Characterizing this as equivalent to ActiveX shows an ignorance of either the original browser wars or Google's modus operandus these days.