DO you want square-tip like a chisel (Razel) or blunt-tip like a rescue or a dive knife?
Gerber River Shorty and EPIC are two I can recommend. The Shorty is full serrated (some don't like that) and the Epic has more of a point (though it's still subdued), but both are small, non-threatening & unobtrusive, and inexpensive (not something you're worried about losing) while fairly durable and ergonomic.