Wild & Wicked Weapons
Popsci has an awesome compilation of some ridiculous weapons developed by the military. Some of them are old and discontinued, like the Gay bomb (yes, they were considering developing a bomb that turns you gay). And others that are pretty cutting edge, like the railgun that fires a 7 pound shell at 7 times the speed of sound and some remote controlled cyborg spy moths.
Here's a link, check it out:Worlds Spookiest Weapons