What are the solutions? Anything open source. If only commercial applications, what are they?
Highly unlikely you'll find anything open source imho, but willing to hear otherwise. My reasoning for that is the costs involved for having an MPI accredited with Visa/MasterCard are.. significant (if I remember correctly it was around $5000 per scheme?). And any open source solution would need to go through accreditation for each 'build'.
So you'll most likely need to look at prebuilt commercial offerings. It was a good few years ago now, but we went with nsoftware, one of the first to market a standalone MPI
http://www.nsoftware.com/products/3dsecure
http://www.nsoftware.com/ibiz/epayment/technologies.aspx?sku=BPP5-A