Use along with a metal twist-tie to splice together a broken heating element in an oven broiler. Like splinting a leg, use the paperclip to bridge the gap, secure on both sides by wraps of twist tie. (One of my rare McGyver moments at a rental cabin.)

The lowely paper clip can be bent to hold things together that are glowing hot.

Substitute for proper safety wire or cotter pin to keep things from falling or vibrating apart.

Really poor, but sometimes functional substitute for a hinge pin.

Can be used as a scribe to mark wood, metal, or plastic parts.

Sometimes can be used to unclog small tubing or jets.

Handy with a cotton patch to clean the little spaces of some firearms.

I keep some jumbo size (about 2" long) paperclips in many of my tool kits.