Back in fall of 2009, VMware licensed RTO's Virtual Profile solution. I guess VMware liked the solution so much they decided to buy the company - at least most of the company. VMware bought all of RTO except RTO's TScale solution (most likely because Citrix licensed TScale for XenApp). Brian Madden has a review of the acquisition on his website answering other questions like "what happens to RTO software?", "what does the RTO deal mean for VMware?", "What about others? Symantec? Citrix? AppSense?"