Microsoft has announced that there will not be further standalone releases of Solver Foundation. If you are looking for other optimization or analytics frameworks, consider Azure ML or Frontline Systems’ Solver SDK.
Here is the announcement from the Solver Foundation MSDN forum:
As users have pointed out, Microsoft has not been active on the Solver Foundation forums since Nate left. We have been quiet while we have gone through restructuring and planning. Some would say we have been too quiet. We know we have very loyal and enthusiastic users who want to know the future of Solver Foundation. So, here is a long overdue statement about our plans for Solver Foundation.
The current 3.1 release of MSF will be the last release as a standalone install. We are working hard on integrating Microsoft Solver Foundation into a larger analytics framework that will help users build both prescriptive and predictive analytics. We look forward to releasing this new product for your use as soon as we are able to do so. This new product will provide a migration path for current Solver Foundation users and partners.
We would like to continue to keep the current forum open to the community to discuss MSF until the release of the new product. However, Microsoft will be providing limited support of MSF in terms of monitoring the forums and providing bug fixes during this transition time.
We have been responding to email and will continue to do so. If you have feedback on issues/bugs/improvements, we welcome your feedback via email@example.com. Please check back on the forum for future announcements with regards to the new analytics product.
Thanks for your support.
The Solver Foundation Team