Hi 3tg
I don't know much about SVSlope but have used LimitState::GEO quite a lot recently. Like finite element packages it can be used for pretty much any geometry of geotechnical problem - not just slope problems. But unlike finite elements there are very few input parameters to worry about...
After reading this thread folk might get the idea that limit equilibrium and finite element analysis are the only options for slope stability analysis. But you could use finite differences, e.g. the FLAC/SLOPE program, see: http://www.itascacg.com/flacslope
Or how about discontinuity layout...