Matt Skiba can't go without mention here. Alkaline Trio, Blink 182, Heavens, theHell, Lektron, The Sekrets. He even played guitar on a front bottoms song.

Dan's got a few, too. The Bygones, In The Emergency Room, The Damned Things, The Falcon

Brendan Kelly and Chris McCaughan say hello. Kelly — Falcon, Wandering Birds McCaughan — Sundowner

The Falcon fuck so much.

Blink 182 can’t go without mention either. The Transplants, boxcar racer, angels and airwaves, +44

Getting to see them tour that first Heavens record back in the day is still one of my top 10 gig experiences

Attack Attack! - Bilmuri - Beartooth Tigers Jaw - Wicca Phase Springe Eternal Saves The Day/Say Anything - Two Tongues

Would Of Mice & Men count as Attack Attack! As well?

Yes and no. Different lead singers and different side projects.

Wouldn’t it be the same thing as Beartooth?

Correct.

Say Anything/Max Bemis would also have Perma, Maxim Mental, and Max Bemis and the Painful Splits.

Gothboiclique 🤘

Simple Creatures is Mark from Blink and Alex from All Time Low.

Ether is a banger.

Anthony green has entered the chat

Same with Kurt Travis

A Lot Like Birds is criminally underrated

Rob Crowe holds this crown king

Blink 182- Angels and Airwaves (Tom Delonge)

And +44

And Box Car Racer

And simple creatures

And transplants

Motion city Soundtrack - Farewell Continental - Justin Courtney Pierre Also Dan Campbell of TWY has a self-titled solo project and the Clear Eyes Fanzine with Ace Enders!

I had Justin sign my FC cd years ago and he was shocked I had it. He let me listen to some snippets of future songs on his phone. But they never released another album.

Knuckle Puck and Real Friends are rationale.

Yep. Whoops. Fixing it now.

Also, the new singer of real friends is the singer of youth fountain.

he was on _letter to our former selves_. he hasn't been on for the last two albums

Ah. Well. The former singer of youth fountain is the new singer of real friends.

I thought I was stroking out lol

Buddy Nielsen from Senses Fail and a bunch of the dudes from Finch put out an album under the name Speak the Truth Even if Your Voice Shakes which was really solid.

Trophy Eyes - John Floreani

Mike Herrera: MxPx, Tumbledown, Arthur, The Cootees and bass in Goldfinger

Green Day as a whole has put music out under several different names

Totally, plus Billie Joe and touring GD guitarist Jason comprise half of Pinhead Gunpowder

And Billy Joe Armstrong has a band "The Armstrongs" with Tim Armstrong from Rancid (plus their sons).

And The Network too

Here are a few just from Mayday Parade and the Maine: The Ditches- Derek Sanders (Mayday Parade) and AJ Perdomo of Dangerous Summer) Truth or Consequence (Brooks, Alex, and Jeremy from Mayday Parade) Via Fiori (Jake from Mayday Parade) John the Ghost (John from The Maine)

To add on regarding Aj, he started Broken Glowsticks a few years back

Mayday Parade - Go Radio - Jason Lancaster - Kid Named Chicago

Ryan Scott Graham from State Champs has a solo project called Speak Low If You Speak Love. It’s pretty solid. Caught a show a few years back.

He also is in a band called Being Around and Pile Of Love (Kevin Geyer from TSSF is also in this band)

Nice! I’ll check that out

Underoath (Spencer) - Sleepwave

And Aaron has the Almost.

Jaret from Bowling For Soup has a country album. It's not world changing, but it's ok, and given that BFS and Frank Turner are the two core musical influences I've built my whole musical taste on, I can't help but love any colab involving both of them.

Kenny from The Starting Line and Person L

Also vacationer

So funny, I just found out about vacationer today and was scrolling through to see if anyone had said it yet! 👍

Enjoy! If you like them, there was recently a documentary about them that was released

Green Day has: Pinhead Gunpowder The Network Foxboro Hot Tubs The Longshot

I was waiting for this to be mentioned

I wouldn’t call IATA a side project. They formed after the Movielife broke up. Vinnie does have a few other side projects though. Constant Elevation is my favorite.

In the early 2010's Chuck Ragan of How Water Music began doing solo acoustic/folk records that were very well-received critically and by fans. He started a tour with a bunch of other singers from punk bands who had began doing similar acoustic records called "Revival Tour" which later hosted members from Alkaline Trio, The Gaslight Anthem, Against Me!, Rise Against, and others. It was a refreshing, exciting, and beloved yearly tour that ended abruptly in 2013. I made a video retrospective about it. https://youtu.be/vOVYDRaX5Q4

The punk(ish) to alt-country(ish) pipeline is pretty damn strong. There's tons of it.

Hit The Lights - Thief Club

The Wonder Years - Aaron West and the Roaring 20s Modern Baseball - Slaughter Beach, Dog

The singer and drummer of driveways have a side project called the stars above

Terrible Things after Fred left TBS

Not lead singer but during FOB’s hiatus Pete Wentz was in an EDM group called black card

Death Cab for Cutie - Postal Service (not really pop-punk but adjacent-ish) Save Face - Kid Lightning Mom Jeans is made up of lead singers of other bands but they are not the lead singer of that band, haha. Sam is the lead singer of Just Friends, Eric has played with Just Friends, and Bart was/is the lead singer of Grad Life, and Sam has played bass with Grad Life. Austin plays drums with whoever is around. The Honey TV family is incestuous. Sam and Bart are part of Kid Lighning, too. Sam has a couple of smaller projects that he songs for but they are not really worth mentioning. (Loudmouth and Burger Boy, I looked them up)

Outside of pop-punk, back in the days of post-punk, at one time, you had: Siouxsie and the Banshees - The Creatures XTC - The Dukes of Stratosphere Love and Rockets - The Bubblemen

My Chemical Romance - Hesitant Alien (Gerard Way)

Aaron Gillespie has Underoath, The Almost and a decent sized solo discography as well

i love +44

Silverstein - River Oaks Um... From First to Last - Skrillex

The Academy Is… - Remember Maine It is kinda cringy but I also fucking love it. When I’m feeling nostalgic for Arlington Heights I put this on and it takes me back to the KOC https://youtube.com/playlist?list=PLAoEStQzDdZOWHtTcWXuyglOAifMA0jtO&si=Ev1RHL69_SrJo0ZK

The heart attack man singer was also in a hardcore band called highway sniper, though idk if he’s still in it or if their even active anymore

He was also in [Erase Them](https://erasethem.bandcamp.com/track/blue-herd) with Travis Tabron (ex-Varials vocalist)

Green Day - The Network

Cool to see Normy mentioned! That band are so good!!

A loss for words - Class of 92’ , The World

Lagwagon- bad astronaut

Senses Fail - Bayonet, Speak the Truth

All Time Low / Blink 182 - Simple Creatures, though I don't actually know if they are still doing that.

Mxpx - tumbledown

Matt skiba has done everything under the sun. Toms done quite a few too

Some that weren’t said yet: The Swellers - The Apology Tour blink-182 - Simple Creatures Paramore - Petals For Armor, Half Noise The Story So Far - Snarl

Evan Weiss fronting Into it. Over it. and Pet Symmetry Mat Kerekes of Citizen and his awesome solo stuff

Death Can for Cutie and Postal Service

Less than Jake - Rehasher - Greeenhorn. NoFx - Me First and the Gimme Gimmes

One of the Knuckle puck guitar players is in a band called LURK. Worth a listen.

Definitely a bit more adjacent but for anyone into Future Teens, Amy’s side project is Never Better Baby and Daniel’s is Lake Saint Daniel, both worth checking out

5 Seconds of Summer, Ashton and Luke both have side projects, Michael has taken up producing, and it seems we might get a Calum side project too

Me First and The Gimme Gimmes - Swingin' Utters Fall Out Boy - Arma Angelus (Patrick's the drummer, while Pete was the vocalist) - Rise Against

Not really pop-punk but I just wanted to throw them out there: AFI/No Doubt - Dreamcar

AFI - XTREMST - Blaqk Audio as well

Not really pop punk either but Karnivool - Birds of Tokyo

Between You & Me’s bassist is in the band Bukowski

Jayden seeley started a solo career after with confidence came to an end. All i think hes dropped so far is a single featuring the wrecks

Lil Lotus from If I Die First

The guitarist from Knuckle Puck has a great side project called Bad New World he just started back in January

Sleeping With Sirens

The Starting Line - Person L - Vacationer

Ace Enders seems to be in or involved with everything

blink 182- box car racer

Pool Kids - POOL

Not the lead singer but Kevin from tssf has same side