I ll state up front that I m one of Appistry s original engineers, and now product manager. I ll stick to the technical facts. :-)
As you mention, you can use Appistry CloudIQ Manager to simplify deploying, managing and life-cycling your applications and associated services across your cloud servers. Manager can do this with any arbitrary service or service/application combination, and make sure they stay up and running on each server. Manager scales applications up and down as servers come and go. CloudIQ Manager will work fine with Mule and GigaSpaces.
As for other combinations, particularly for your requirements of scalability, and integration of apps developed in different languages, you could consider CloudIQ Engine as an application platform. Engine could be used in the place of GigaSpaces, or working in combination with them, depending on which piece you are addressing.
CloudIQ Engine is a fully decentralized application container. Engine supports multiple languages for integration, both on the client-side and the cloud-side.
On the client-side, you can use Spring and .NET remoting to call Engine-hosted objects (caller and callee must be in same language) or use the CloudIQ client API (C/C++/Java/.NET/SWIG-wrappable) to submit requests with user-defined process flows, possibly eliminating the need for the ESB. Flows execute in the cloud on Engine, and allow a single request to orchestrate calls across multiple methods. The methods can be in different languages.
On the cloud-side, you can deploy Java objects (POJOs and Spring Beans) and .NET objects (PONOs), as well as C/C++ libraries as Engine applications. Java and .NET objects can be deployed unchanged. C/C++ (and other binary libraries) likely require some wrapper code. Meta-data describes workload policies and other cloud-side behavior for your code.
Engine applications are fully symmetrical. Every server in the cloud runs your application code. Built-in, software-based load balancing directs requests to the server best able to handle the job. Your code inherits scalability from the platform without code changes. Beyond scale, your application also gets reliability and automatic fail-over for free, along with the ability to define in metadata how you want your application to act in response to failures. Engine automatically scales your code, unless it is non-thread-safe, across all available CPU cores. If your code is not thread-safe, CloudIQ can run it efficiently, but at a cost of not utilizing all cores.
You can easily try it out. CloudIQ Platform Community Edition allows free, unlimited use of the software on up to five servers and/or ten processing cores (including production). The community edition is available at Appistry Peer2Peer (registration required): Appistry Peer2Peer
Appistry customer Presidio Health is running Java-based CloudIQ Engine applications on GoGrid with great success. There is a webinar and case study with technical discussion here (registration required): Appistry Resource Library
