This is a stylus that I made for a friend of mine who had lost the one in his NDS lite. This one fits rather nicely into the DS lite's dedicated stylus slot, and works very well on its touch screen. I'm sure you can use it on other screens, as well.

This works best when printed at a slight angle (say, 10Ëš) to the raft, like you see in the .stl version. The .blend version uploaded here is parallel to the raft, which leads to threads getting loose and breaking off if printed verbatim.

After you print this, it works best if you sand the tip into a slightly rounder shape. Apply spray paint if you like - might make the surface smoother, and give it a better look as well.