1980 – The Associates: „The Affectionate Punch“ + „Even Dogs In The Wild“ (backing vocals)
1980 – The Magspies/The Obtainers: „Yeh Yeh Yeh“ / „Lifeblood“ (production)
1982 – Animation: „Frame One“ (production)
1982 – And Also The Trees (production)
1983 – Marc And The Mambas: „Torment“ (lyrics)
1984 – Tim Pope: „I Want To Be Tree“ (?)
1989 – And Also The Trees: „The Pear Tree EP“ (co-production of remixes)
1993 – The Cranes: „Jewel“ (guitar, remix)
1995 – The Strangles: „The Stranglers and Friends – Live in Concert!“ (guitar, live 1979)
1998 – Cogasm: „A Sign From God“ (vocals, guitar)
2000 – Reevers Gabrels: „Yesterday´s Gone“ (vocals)
2003 – Junkie XL: „Perfect Blue Sky“ (vocals)
2003 – Blink-182: „All Of This“ (vocals)
2003 – Earl Slick: „Believe“ (vocals)
2003 – Junior Jack: „Da Hype“ (vocals)
2003 – Blank & Jones: „A Forest“ (vocals)
2004 – Tweaker: „Truth Is“ (vocals)
2005 – Billy Corgan: „To Love Somebody“ (backing vocals)
2006 – Faithless: „Spiders, Crocodiles & Kryptonite“ (vocals)
2007 – Paul Hartnoll: „Please“ (vocals)
2007 – Korn: „Make Me Bad/InBetween Days“ (vocals)
2010 – 65DaysOfStatic: „Come To Me“ (vocals)
2010 – Anik Jean: „J’aurai tout essayé“ (vocals)
2010 – Crystal Castles: „Not In Love“ (vocals)
2011 – The Japanese Popstars: „Take Forever“ (vocals)
2015 – The Twilight Sad: There’s a Girl in the Corner (vocals)
2020 – Gorillaz: „Strange Timez“ (vocals)
2021 – Chvrches: „How Not To Drown“ (vocals)