There are a bunch of more (and less) specialised ones used for contract red-lining. Also in the legal space, sorting through discovery can be incredibly tediou

There are a bunch of more (and less) specialised ones used for contract red-lining. Also in the legal space, sorting through discovery can be incredibly tedious. There are lots of diff-based and diff-like solutions in this space; most are completely proprietary and undocumented.