Virtualized application platforms maker GigaSpaces is the latest to join the OpenStack community. In partnership with Citrix, a founding member of the open cloud OS, the young company also took the opportunity to announce it will soon debut a “truly open” Platform-as-a-Service (PaaS) offering based on OpenStack.

The product will also leverage Citrix OpenCloud, and comes shortly after the two companies teamed up to integrate the Citrix NetScaler and Citrix XenServer parts of the Citrix OpenCloud suit with Gigaspaces’ flagship XAP platform.

Some more details from the announcement:

“Openness: An enterprise-grade hybrid cloud stack solution that includes OpenStack-based IaaS and PaaS and is open to a wide variety of applications, including those based on Spring, Java, .Net, and other non-Java platforms.”

The offering, set to be unveiled at the OpenStack Design Summit later this month, will also support a selection of application stacks and better integration n between the platform and the infrastructure layers to the services offered through OpenStack clouds.

Moreover, the scalable offering is reportedly specifically geared to tackle some of the biggest trends reforming IT, notably big data analytics as well as large scale financial applications and e-commerce. Another feature will enable independent software vendors to SaaS-enable applications while delivering the same solution off and on premises.

GigaSpaces will make the still unnamed product available to the Java community via the the open source JCloud projects.

The open source revolution is taking on the cloud as this trend is growing all throughout the IT industry, and OpenStack is one of the biggest projects going on right now. In addition to GigaSpaces, IT-as-a-Service system automation vendor rPath and open source storage virtualization software vendor Gluster all joined the OpenStack community – and that’s in the last few weeks alone.

Over at another corner of the open source cloud, NoSQL company Couchbase announced the release of Membase Server for Mac OS X, the Mac version of the company’s cross-platform web application data management scaling optimization product.