Currently in the game there are a few weapons obtainable for example The Slime Hammer, the Mini Scythe, the Iron Axe, Magic Staff (I don't remember the name but dropped by minor ghosts), The Staff of the Muse (the first boss), the slime sword, the iron sword, the wooden shield, the catacomb shield. It is very likely that there are more weapons, however the probability of dropping items as weapons is very VERY low so you have to kill and farm a lot to get them (especially the upgraded/rare versions)