An album was completed by Dilla for MCA/Geffen Records in 2003. The album featured Dilla in an unusual position; he only handled MC duties while the beats were supplied by some of his favourite producers. The album contained contributions from Madlib, Pete Rock, Hi-Tek, DJ House Shoes, Karriem Riggins, Supa Dave West, Kanye West, Nottz and more. The album also featured guest appearances from Bilal, Frank-N-Dank, and others. To date, only two of these songs have been heard in any form: a song called "Diamonds", produced by Nottz, which was played live at a J Dilla tribute concert in 2006 - the recording of which was ripped into an audio file and passed around on the Internet; and "Fight Club," which featured guest verses from Nottz and Boogie Man, and was produced by Waajeed and released on Jeed's label, Bling47's compilation, Best Kept Secret in 2003. Other tracks that have been mentioned in interviews, were remakes of Gary Numan's classic, "Cars," entitled "Trucks," and a remake of Vanity 6's "Drive Me Wild", completed with Ahmir "?uestlove" Thompson of The Roots. It is also rumoured that the album will see an official release in the near future.
J Dilla's last show before his passing was in Belgium.
In addition to Jermaine Dupri, Dilla also shared the name 'Jay Dee' with a soul and funk artist, who released records during the mid 70s. This Jay Dee was a protégé of Barry White's and released a version of the song "Strange Funky Games & Things".

The Pharcyde - "Runnin'", "Bullshit", "Splatittorium", "Somethin' That Means Somethin'", "Drop", "Y?" from Labcabincalifornia CD/LP 1995 (Delicious Vinyl)

A Tribe Called Quest - "1nce Again", "Get A Hold", "Keeping It Moving", "Stressed Out", "Word Play" from Beats, Rhymes and Life CD/LP 1996 (Jive Records)

Busta Rhymes - "Keep It Movin'", "Still Shinin'" from The Coming CD/LP 1996 (Elektra)

De La Soul - "Stakes Is High" from Stakes Is High CD/LP 1996 (Tommy Boy)
Proof - "Da Science" from Detroit Hip Hop Volume 1 1996 Modern Tribe
A Tribe Called Quest - "Get A Hold", "Mardi Gras At Midnight" from Jam EP 1997 (Jive Records)

Busta Rhymes - "So Hardcore" from When Disaster Strikes CD/LP 1997 (Elektra)

Janet Jackson - "Got 'Til It's Gone (Ummah Jay Dee Revenge Mix)" 12" single 1997 (Virgin)

A Tribe Called Quest - "4 Moms", "Against The World", "Busta's Lament", "Da Booty", "Find A Way", "His Name Is Mutty Ranks", "Start It Up", "Steppin' It Up" from The Love Movement CD/LP 1998 (Jive Records)

Q-Tip - 11 tracks from Amplified CD/LP 1999 (Arista)

The Roots - "Dynamite" from Things Fall Apart CD/LP 1999 (MCA)

Busta Rhymes - "Enjoy Da Ride", "Live It Up", "Show Me What You Got" from Anarchy CD/LP 2000 (Elektra)

Common - 10 tracks from Like Water For Chocolate CD/LP 2000 (MCA)

De La Soul - "Thru Ya City" from Art Official Intelligence: Mosaic Thump CD/LP 2000 (Tommy Boy)

Erykah Badu - "Cleva", "My Life", "Didn't Cha Know", "Kiss Me On My Neck" from Mama's Gun CD/LP 2000 (Motown)

Jay Dee - "Fuck The Police b/w Move", w/ Frank-N-Dank 12" single 2001 (Up Above)
Busta Rhymes - "Genesis", "Make It Hurt" from Genesis CD/LP 2001 (Elektra)

Chino XL - "Don't Say A Word" from I Told You So CD/LP 2001 (Metro Records)

De La Soul - "Peer Pressure" (Intro & Outro Monologues by Jay Dee) from AOI: Bionix CD/LP 2001 (Tommy Boy)

Lucy Pearl - "Without You (Remix)" 12" single 2001 (Pookie/Virgin)

Busta Rhymes - "It Ain't Safe No More", "What Up", "Turn Me Up Some" from It Ain't Safe No More" CD/LP 2002 (Elektra)

Common - various production & instrumental credits from Electric Circus CD/LP 2002 (MCA)
Frank-N-Dank - "Push" 12" EP 2002 (Mummy / Groove Attack)

Phat Kat - Dedication To The Suckers (EP) LP/CD 2002 (RonnieCash.com)

Slum Village - "Hoes", "Let's", "One" from Trinity (Past, Present and Future) CD/LP 2002 (Capitol)

Talib Kweli - "Where Do We Go?", "Stand To The Side" from Quality CD/LP 2002 (Rawkus)

Fourtet - "As Serious As Your Life (Remix)" 12" single 2003 (Domino)

Brother Jack McDuff - "Oblighetto (J Dilla Remix)" from Blue Note Revisited CD/LP 2004 (Blue Note)

De La Soul - "Verbal Clap", "Much More", "Shoomp" from The Grind Date CD/LP (Sanctuary)

Proof - "Bring It 2 Me" from I Miss The Hip Hop Shop CD/LP 2004 (Iron Fist)

Slum Village - "Do You" from Detroit Deli (A Taste of Detroit) CD/LP 2004 (Barak/Capitol)

Common - "Love is...", "It's Your World (Part 1 & 2)" from Be CD/LP and Be Instrumentals LP 2005 (GOOD Music/Geffen)

MED - "Push", "So Real" from Push Comes To Shove CD/LP 2005 (Stones Throw)

Slum Village - "Who Are We?" from Prequel To A Classic CD 2005 (Barak Records)
Steve Spacek - "Dollar" from Space Shift CD/LP 2005 (Sound in Color)

Ghostface Killah - "Beauty Jackson", "Whip You with a Strap" from Fishscale CD/LP 2006 (Def Jam)

Busta Rhymes - "You Can't Hold A Torch" from The Big Bang CD/LP 2006 (Aftermath)

The Roots - "Can't Stop This" from Game Theory CD/LP 2006 (Island/Def Jam)

J Dilla - various songs & production from Chrome Children CD/LP 2006 (Stones Throw/Adult Swim)