ASLB - Analysis Services Load Balancing
The ASLB tool is a customizable software load balancer for use with Analysis Services. It is described further on the SQLCAT website
To download the source code, go the Source Code tab and and click the Download link then look for the ASLBSetup folder.
A community member amattas has created a customized version he calls Open ASLB which can be found at http://aslb.codeplex.com