Froglord is a doom/sludge metal band from Bristol, England, performing as 'an ancient amphibian with deathray vision and ectoplasmic slime,' blending heavy doom riffs with psychedelic elements and whimsical amphibian-themed imagery. Their discography includes Metamorphosis, Frogman, and The Froglord Cometh, with active UK touring.

Frogskin is a sludge metal band from Nurmijärvi, Finland, formed in 2012. The band delivers thick, abrasive sludge metal from the rural municipality north of Helsinki.

From the Caves is an experimental sludge/doom metal band from Funen, Denmark, formed in 2017. The band pushes sludge and doom metal into experimental territory from Denmark's garden island.

From Yuggoth is a sludge metal band from Dresden, Germany, formed in 2025. Named after the distant cosmic body in H.P. Lovecraft's mythology, the band channels Lovecraftian dread through thick sludge metal.

Frvst is a black/sludge metal band from Berlin, Germany, formed in 2019. The band fuses the cold aggression of black metal with the thick, tarry weight of sludge metal.

Fuchur is a stoner/sludge metal band from Berlin, Germany, formed in 2016. Named after the luckdragon from "The Neverending Story," the band delivers heavy stoner and sludge metal from the German capital.

Fuck-Ushima is a sludge metal band from Tampere, Finland, formed in 2012. The band delivers thick, abrasive sludge metal with a provocative edge.

Fucked Up and Ready to Die is a sludge metal act from Wales, emerging in 2025 with crushing, irreverent heaviness. The project channels Welsh aggression through uncompromising sludge metal.

Fucking Hands is a sludge/doom/stoner metal band from Oulu, Finland, formed in 2018. The band merges sludge, doom, and stoner metal into a crushing wall of sound from northern Finland.