Energy blaster

The Energy blasters were created by The Preachers on Pete's World to kill the Cybermen. They could easily blow off the head of a Cyberman.

The Doctor enhanced some blasters to penetrate the heat shields and Polycarbide of a Dalek. The blasters had temporarily disabled the Cult of Skaro's weapons, though the Daleks quickly adapted to the new weaponry and regained control over their weapons. (DW: Doomsday)

Upgraded versions of these guns were developed by the parallel Torchwood some time later, and used by Rose Tyler, Jackie Tyler and Mickey Smith. They fired a thinner, more opaque beam which could easily destroy a Dalek. (DW: The Stolen Earth / Journey's End)

The weapons room of Torchwood Three contained blasters, but the room was locked when Lisa Hallett attacked so they could not use them. (TW: Cyberwoman)

The Cybermen stationed at Demon's Run were also armed with what appeared to be a variation of these blasters. Seeing as these Cybermen were in the 51st century it would appear that they have permanently incorporated these weapons into their arsenal. (DW: A Good Man Goes to War)