NCache. Professional. NHibernate
90% of features are OpenSource.
NCache provides a cache provider for NHibernate and transforms its stand-alone InProc cache into a distributed cache. As you know, if your application is using NHibernate and running in a multi-server environment, the NHibernate stand-alone cache won't work because it does not synchronize the cache across multiple servers. However, NCache provides a distributed cache and fills in this need for NHibernate. Alachisoft.NCache.NHibernate.Professional requires NCache 4.9 to work.