Although it's now unmaintained, I've used [Fari](https://fari.app/) as a place for dice, index cards, and clocks.

I have really enjoyed using FoundryVTT. A one time payment for the software and then you can self-host the server easily. I don't know if that is outside your criteria. If you aren't looking for VTT battle mapping though, it's probably more than you need. I'm still using Discord for voice since that is where my players are at but I want to get away from it too.

FoundryVTT. It's a one time license fee and though the code is not completely open source, it's mostly just client side JavaScript that is completely unobfuscated and supposed to be able to be viewed so everyone can modify it with addons. The server is obfuscated JavaScript. It's completely and easily self-hostable. So far, the company/people behind are just TTRPG nerds just wanting a good and friendly VTT (...wanting to make money with it). It is a full VTT though. If you really only want chat+dice rolling, I would suggest a matrix server with a dice roll plugin/bot.

Probably worth mentioning foundryVTT has voice chat integrated. I personally use FoundryVTT, matrix and rallly.co (with 3 "l"s) for my games

I'll look into Foundry. Not sure what the specs are that I would need in order to host. How would I set up a dice bot for matrix? Would I need to self host or is there an existing server I could create a space in?

The foundry specs are so low you can probably use a toaster for the hosting. The client (web browser) uses graphics for the tabletop so the requirements are a bit higher, but still every device currently available will be able to run it I'm pretty sure. The main difficult requirement is the networking, whereever you host it will need an open port for people to connect to. I don't know how hard that will be for you. Don't know much about the Matrix stuff, I've just seen it before.

Finally! A use for my 486!

Rolisteam is a FOSS (and self hosted) VTT. However, it hasn't evolved much in the previous 15 years. It has all the main function (Shared white board, load map with fog of war and move token on-it, roll dices, chat) even has a character sheet manager. But definitely not as fancy as a modern payware one

Albion is a FOSS friendly game. There's a Linux installer available on their download page, and a huge Linux guild.

I don't think that's a ttrpg, no?

I'll still keep it in mind, thank you!

Ok, gotcha! Thanks for the info!

I saw software mentioned and thought you wanted an MMO. My bad. Still, you should checknit out. It's a good game.

Mostly roll20. I asked my crew sometimes ago to try Foundry (mostly because it’s self host if I understand it correctly) but they declined

For anybody else that hates needless acronyms, FOSS apparently stands for Free and Open Source Software.

I run a West Marches server on Foundry that had a few dozen active players at it's height. I ended up just renting a server on ForgeVTT, a cloud hosting service for Foundry. I believe they had a free option that's good for more casual users but even I'm only paying like $5/mo.

I've mostly run Lancer games since last year, so my go-to tools were [Owlbear Rodeo VTT](https://www.owlbear.rodeo/) and [WitchDice](https://witchdice.com/) for rolls, and recently upgraded to Foundry. However, when it comes to Voice Chat, we were still using Discord. With the recent news, I've been considering moving our channel to [Revolt](https://revolt.chat/) and testing out how its Voice Chat works, even if its not as good as Discord.

I'm surprised anyone on Lemmy isn't aware of that one. I 100% would have spelled it out of not for the fact that this audience is 95% Linux nerds.

It is still a bit maintained. When the backend provider broke, it has been updated. Nevertheless, the provider is still a company. I don't have the experience to switch to peer.js to make is really open source and free.