Caching Frameworks for .NET other than Velocity

What other caching frameworks are available for .NET besides the project codenamed Velocity. What are the ALT.NET options?

From stackoverflow

• There's always Oracle Coherence. Many of the caching technologies mentioned here also have .Net libraries (eg memcached.

• Distributed cache frameworks? Free ones?

  There's a Windows version of memcached but it's not great. There's Cacheman, which seems ok. I'd recommend Velocity over those, I've seen Velocity used on a pretty high traffic website and it gets the job done.

• There is Ncache and the free NCache Express. Also take a look at ScaleOut State Server.