Okay so, this is a list of everything I have that isn't part of the 4 main albums and their related deluxe editions/singles/EPs (basically I'm listing pre-FATM, collabs, demos/acoustic versions, covers, unreleased, etc). I'm sure a few things may be missing, but my collection is pretty extensive lol. There are some random songs she's done backing vocals for that I didn't include because she's barely in them. I also didn't include tracks which sample her songs. The first 3 sections are in a somewhat chronological order (definitely not exact at all), I tried with the last section, but she’s done so many covers over the years and I kinda gave up.
Pre-FATM and Unreleased/Unofficial/Lesser known songs
Sunday (Ashok) - Florence sings on the majority of the band’s tracks but this is the only one which is just her
Happy Slap (Ashok) - Became Kiss With A Fist
Halloween - “Florrible and Misrabella”
Small Hands - “Florrible and Misrabella”
Little Donkey - “Florrible and Misrabella”
Bricks + Throwing Bricks
Tear Out My Tongue/Ye Olde Hope (Unreleased Demo)
Tear Out My Tongue/Ye Olde Hope (Live)
Paper Massacre (Unfinished)
As Far As I Could Get (Vinyl Exclusive)
Conductor (Target Album Exclusive)
Pure Feeling (Target Album Exclusive)
Covered In Blood/WTF (Unreleased)
Tantalus (Unreleased)
Honey Like (Unreleased)
Baptize - Alternate (better) version of Dua Lipa’s Electricity (Unreleased)
Veronica’s Hymn - in the HBO Series The Third Day
Demos and Alternate Versions of FATM songs*
Don’t Tell Me (Alternate Version of I’m Not Calling You a Liar/Ghosts)
An Offering (Rabbit Heart Demo)
I’m Not Calling You A Liar (Ukulele Version)
Swimming - Demo
Falling - Demo
Between Two Lungs - Demo
Bird Song - Alternate Version/Acapella
Filthy Fingers (Alternate version of Girl With One Eye) - “Florrible and Misrabella”
Dog Days Are Over - Demo
Cosmic Love- Acoustic
Blinding - Acoustic
You’ve Got the Love - Acoustic (a few different acoustic versions she’s done live)
Hurricane Drunk - Acoustic/Alternate Version
My Boy Builds Coffins - Demo
Girl With One Eye (Bayou Percussion Version) – Technically a remix I guess, but it's great
What The Water Gave Me - Demo
No Light, No Light - Acoustic
Spectrum - Acoustic (there are a couple different acoustic versions of spectrum she’s done live, and they are SO GOOD)
What The Water Gave Me - Acoustic (live)
Heartlines - Acoustic
Breaking Down - Acoustic
Lover to Lover - Acoustic
Shake it Out - Acoustic
Never Let Me Go w/ Blood Orange - Live (blood Orange has a great remix of the song)
Over the Love (Of You) - Alternate version w/ SBTRKT
Sweet Nothing - Acoustic (live - BBC Radio 1)
Delilah - Demo
What Kind of Man - Acoustic (live - a few slightly different versions)
Ship to Wreck - Acoustic (live)
Queen Of Peace - Acoustic (live)
St Jude - Acoustic (live)
Mother - Odyssey Version (i.e. the part 7 of the odyssey series)
Hunger - Acoustic
Patricia - Acoustic
Sky Full of Song - Acoustic
Collaborations (Including one-off live performances)
She’s No Sense - The Big Pink
Riverside - Kid Harpoon (flo does backing vocals)
Suspicious Minds w/ Glasvegas (live)
Still Life w/ The Horrors (live)
Here Lies Love - David Byrne/Fatboy Slim
If I Rise w/ A. R. Rahman (live)
Toothpaste Kisses - w/ The Maccabees (live)
Gimme Shelter w/ The Rolling Stones (live)
Fireworks w/ Drake (live) - haven’t found any great recordings
I Come Apart - A$AP Rocky
Midnight - Cosmo (Cosmo was a project by Felix White which released like 6 songs, Florence does background vocals for a lot of the other tracks)
Southern Man w/ Neil Young (live)
Hey Girl - Lady Gaga
When In Disgrace With Fortune and Men’s Eyes - Rufus Wainwright
Wild Season - Banks & Steelz
Constellations - Jack Ü (Unreleased)
Wild Horses w/ The Rolling Stones (live)
Nobody Get What They Want Anymore w/ Marlon William (live)
Light On w/ Maggie Rogers (live)
Covers (Includes live performances)
Pearls and Roses (live cover/alternate version of Ashok’s Under the Thumb) - the only recording of it I’ve found isn’t great
“Team Perfect” covers of Green Day’s album Nimrod + a couple Blink 182 (collab with Dev Hynes)
Maps (Yeah Yeah Yeahs Cover) - Live, haven’t been able to find any good recordings of it
Since U Been Gone w/ Mark Ronson (Kelly Clarkson cover) - Live
I’m Going Down - w/ Kid Harpoon (Bruce Springsteen cover)
If I Had a Heart/Blinding (live - covers part of Fever Ray’s If I Had a Heart before singing Blinding)
Can’t Speak French (Girls Aloud cover)
Oh! Darling (The Beatles cover)
Walking on Broken Glass (Annie Lennox cover) - live
The Rat (The Walkmen cover)
Don’t Let Go (En Vogue cover) - Singing with the original song
Borderline (Madonna cover) - Singing with the original song
Halo (Beyonce cover)
Take Care (Drake cover) - live BBC Radio 1
Back to Black (Amy Winehouse cover) - live
The Chain (Fleetwood Mac cover) - live
My Baby Just Cares for Me cover w/ Jools Holland
I Don’t Wanna Know (Mario Winan cover)
Last Christmas (Wham cover)
All I Want For Christmas (Mariah Carey cover) - Partial (like 30 seconds)
Part of Your World (from the Little Mermaid) - about 40 seconds long
Amazing Grace (done live a couple times)
Rebel Rebel (David Bowie cover) - live for the MET Gala 2011 (have only been able to find a short recording of the rehearsal)
Something’s Got a Hold on Me (Etta Jame’s cover) - studio and live recorded
Wild Wild Life (Talking Heads cover)
Hitchin a Ride (Green Day cover) - live w/ Dev Hynes
Galaxy of the Lost (Lightspeed Champion cover)
Times Like These (Foo Fighters cover) - live
Tiny Dancer (Elton John cover)
Flakes (Mystery Jets cover)
I Love It (Icona Pop cover) - live w/ Dev Hynes
Stay With Me (Sam Smith cover) - live
I Love You All the Time w/ The Maccabees (Eagles of Death Metal cover)
I Heard it Through the Grapevine (Marvin Gaye cover)
Only Love Can Break Your Heart (Neil Young cover)
Love Hurts (The Everly Brothers cover) w/ Father John Misty - live
People Have the Power (Patti Smith Cover) - only sings part of the song (live - can’t find a great quality one though)
All You Need is Love (The Beatles cover) - Performed live a few times w/ The Maccabees
Where Are Ü Now (Skrillex/Diplo cover) - live BBC Radio 1
Fairytale of New York (The Pogues cover)
Silver Springs (Fleetwood Mac cover)
Have Yourself a Merry Little Christmas
*If an acoustic version has (live) beside it, that means there is no “official” acoustic recording, but that she’s done the song acoustically before – usually several times – there is a least one really high quality recording out there of each in this section (these versions are different from the MTV Unplugged versions).
Feel free to ask if you want links or downloads to any specific ones