Besides needlers I've always loved Sonic's in Star Frontiers, so naturally my fav is:

Shockwave Gen

In real life, they call it the "Thunder Generator," and it's a (mostly) non-lethal Israeli weapon that sends out a series of loud, knock-you-on-your-ass shockwaves. We're talking 60 to 100 per minute at a range of 50 meters, though tests show they can boost that distance up to 100 meters. It's similar to a very loud speaker, only it feels like being in front of a firing squad. Read more: http://www.cracked.com/article_20257_5-insane-sci-fi-weapons-that-now-exist-in-reality.html#ixzz2M2aFtqfk