Browning has a unique folding knife that is both inexpensive, well-made and beautiful. The handle of the Even Money separates into two parts, with the blade resting between the two sides. Once you rotate the knife fully through, it locks into place.
This is a solid knife for around $28.
The pocket knife has a 2" blade and a 4" handle, and you can get the Even Money in either Dagger, Tanto or Point Drop blade styles.