To get the ball rolling, here are a couple of Alex's recently made Barbed and Tanged arrowheads, (for size comparison he's used a 10 pence coin). He's been using antler and stone to create the basic flake to then make the arrowhead (antler = soft hammer and stone = hard hammer). To produce the fine detail he has then used a small hammer stone and copper tipped pressure flaker, tools seen below.

Top, Soft Hammer.
Bottom, Hard Hammer.

From Left to Right, leather pad for pressure flaking (stops you from getting cut!), two antler pressure flakers, two wooden copper tipped pressure flakers and top various small hammer stones for differently shaped flint.