Which software will we use for isolated slope footing design?
There is one application available for this called Spread Footing from GEO5. You can visit the link posted below to reach the official page in order to download the trial.
Official website: http://www.finesoftware.eu/geotechnical-software/spread-footing/
You can try another one from ASDIPSoft: http://www.asdipsoft.com/asdip-foundation/