Cloudozer LLP is a company behind Erlang on Xen and related technologies. The technologies possess unique properties that allow creation of super-scalable zero-footprint cloud. More information about Erlang on Xen can be found on the community website - erlangonxen.org.
Erlang on Xen is open source. The source code repository is hosted at https://github.com/cloudozer/ling. The open source license does not permit its use with proprietary software. To use Erlang on Xen with proprietary products you need to use the public build service or obtain a separate license from Cloudozer LLP.
A few places to start: