Vogon Constructor Fleets in The Hitchhiker's Guide to the Galaxy. Vogon civil services are not only able to demolish entire planets, but have means and cause to do so regularly (to create and maintain hyperspace by-passes). The Earth falls victim to one such fleet in the beginning of the story to make way for a hyperspace expressway. The radio, book, and the 1981 TV series versions of the story refer to demolition beams, though the mechanism is not shown distinctly in the 2005 film. There is also the ultimate weapon designed by Hactar (a giant space-borne computer). It is a very small bomb that when activated will join the heart of every major sun with the heart of every other major sun turning the universe into one gigantic hyperspatial supernova. The weapon was designed for a race of extinct aliens but was taken up again by the inhabitants of the planet Krikkit so as to wipe out all other life in the universe and permit them to be the only remaining inhabitants. Also, the Krikkit Battleclubs can destroy major suns with their hypernuclear grenades. Lastly, although not typically considered part of the main five-book trilogy, the short story Young Zaphod Plays It Safe mentions Zaphod passing by the doors of rooms filled with chemical and other agents that could sterilize, irradiate, explode, et cetera a planet; he then remarks that he is therefore glad he is not a planet.
The Covenant operated a number of lighter capital warships. These include some of the smaller Covenant cruisers, like the CCS-class battlecruisers and the CRS-class light cruisers. As well as the various corvette, frigate, and destroyer classes the Covenant operated.