In May HP (soon Hewlett-Packard Enterprise) announced the plan to build an offer based on its own OpenStack distribution, codename Helion, supported over the next two years from a $1 billion budget.
Last week Helion has been broadly released in GA alongside HP Helion Development Platform, its companion PaaS (Platform-as-a-Service) solution based on Cloud Foundry.
Helion’s features don’t differ much from the standard, on the integration side it supports VMware and KVM but not Microsoft Hyper-V.
Also Eucalyptus, recently acquired from HP, isn’t supported yet but considering that AWS integration is one of the key component of Helion strategy the wait will not be long.
You can find more information about HP Helion Portfolio here.