We're launching a new open source Bitcoin project called Bitcore, making it easier than ever to build things that interact with the real Bitcoin network.
Like several other companies and projects, we created an internal fork of Stefan Thomas' bitcoinjs project. We've decided to open source that fork and put some effort into ensuring that it had sufficient capability out of the box to attract developers to start using it. We felt we needed an initial project that uses the bitcore stack to ensure it was indeed useful for real projects from day 1. That project is called Insight and is a simple block chain explorer.
You can join the action here http://bitcore.io