i assume you mean a knife blade, not multi-tool/SAK functions...

-ferro rod scraper
-fire steel
-whittling
-cutting rope/fishing line/vine
-opening packaging
-cutting tags off stuff, especially clothes
-i have been known to use it as a shovel
-bee stinger scarper
-pry bar
-nail file/clippers
-signal mirror
-screw driver
-hammer
-spoon