The dagger Sting was known to have special powers against giant spiders (distant offspring of Ungoliant) and could cut their webs with ease.
Her conflict with Morgoth over the Silmaril was the subject of Blind Guardian's song "Into the Storm", from their 1998 album Nightfall in Middle-Earth.
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Afterward the light of the trees persisted only within the Silmarils of Fëanor.
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On their 2006 album The Morrigan's Call, the Irish Celtic metal band Cruachan featured a song "Ungoliant" as well as one named after Shelob.
Melkor destroyed the Two Trees of Valinor with the help of Ungoliant (bringing an endless night to Valinor), and fled back to Middle-earth, to his other stronghold, Angband.