For Led Zep fans: Page and Bonham play on Screaming Lord Sutch's LP "Screaming Lord Sutch and Heavy Friends". It is fashionable to call this one of the worst LPs ever made but it isn't; it's fabulous. It is an adjunct to Led Zeppelin 1 & 2.
Pete Townshend plays (great) lead guitar on Roy Harper's most recent album "Man & Myth" on the track "Cloud Cuckoo Land"
Ian Wallace , drummer with King Crimson (Earthbound and Islands) ,who later appeared on countless albums and also became a member of Don Henley's band appeared on this 1969 album by Sandie Shaw , which is also noteworthy for featuring the first Led Zeppelin cover ever , Your time is gonna come ( as well as other great covers such as Lay lady lay and Sympathy for the devil)
Little Feat (without Lowell George) is the backing band on this Robert Palmer album which also features a sublime version of the band's Spanish moon
Stevie Winwood playing on the first two Vivian Stanshall (Bonzo Dog Doodah Band) albums, and Richard Thompson on the third,Teddy boys don't knit
Ahhhhh....minutiae...come to papa! Renowned Canadian and Australian-born broadcaster, historian and music journalist Ritchie Yorke is credited with playing the tambourine on "Oh What A Feeling" and the anvil on "Prince Of Peace" on Crowbar's euphonious second studio album Bad Manors: Crowbar's Greatest Hits Volume 1.
Both Levon Helm of The Band and Bill Mundi of the Mothers of Invention play drums on John & Beverley Martyn's 1970 Stormbringer album
Mundi also played on Dylan's New Morning and Fred Neil's self-titled album (two albums I love), among many others.
Maurice also plays piano on one of the versions of "Isn't It A Pity" - but never specified which one. (I'd almost guess #2, since that's more piano-heavy.)
Did you know that Pete Townshend does not play at all in "Forever's No Time At All" from his first solo album, Who Came First?
You're misreading me. The bassline is just SO excellent is all I'm saying. I'd never been that keen on Wyman as a bassist but always thought 'Well he blazes on that one' so to find, fairly recently, it was Ron was, well, the revelation. PS-learning so much on this thread!