Not wanting to sound snarky, but every one of these pictures reference a commonly seen mainstream anime. I apologize if you don't know what these anime are, but I expect a thread speaking about your favorite anime/manga weapon would expect the people discussing wherein having a general knowledge of anime. In any case the people you quoted out of irritation are:
1. Fooly Cooly
2. Tenga Toppa Gurren Lagann
3. Neon Genesis Evangelion
4. Fist of the North Star
5. Bleach
6. Railgun
Thanks! And I wasn't trying to sound snarky myself. :>
I've pretty much heard of all the animes on that list (except #1), but I haven't actually seen them, so I wouldn't know of the weapons! v_v