git clone git://github.com/c9/core.git c9sdk cd c9sdk scripts/install-sdk.sh
There is a cloud9 v2[2] alterantive but ide.c9.io just more polished.
[0]: https://github.com/c9/core#installation
[1]: https://github.com/c9/core/blob/master/LICENSE-COMMERCIAL-US...
[2]: https://github.com/exsilium/cloud9