Opensource Tabletop systems on roll20?

Due to the drama that is happening with certain companies acting weird, I'm looking for a replacement game system for our group on roll20.  We've been playing 10 years together, went from DND 3.0 to 3.5 to recently 5.0.  We've also played CoC, GURPS, Shadowrun, and a few others.  Right now running a roll20 CoC game but might transition again. Keys: - Must be opensource as in free to modify and release. - Must allow for content to be created that is owned by the content creator and not suddenly able to be claimed as royalty free by someone else. - Must have integration into roll20. - Would be nice to be able to transition from different styles/eras of games, from Tolkein to Cyberpunk to Superheroes to Space. I feel just these asks makes it impossible since most of the ones that fit this are basically BindRPG and Gods & Monsters, and even then it's very limited with no support on roll20. Yes, I'm sure your <small game developer> is great, till they get bought (and I don't blame anyone for taking a paycheck), and then the new hedge fund wants to squeeze more money out their players. I feel there is an opportunity here for a system for us all to use.  And I know it's a lot of work and I feel I'm not alone out here.  And building rule sets is tough, but there has to be a good system we can all semi-agree to, right?  RIGHT? Anyone have ideas or thoughts, I can't be building the first wheel here.

Kobold Press is already thinking along those lines . 

Yeah, I feel that having any companys own the open system isn't enough, because companys and people can be bought.  So it has to be released under something like GPL to have no chance of getting consolidated. I would not blame any publisher in wanting to get paid for their work.  I would not blame any publisher wanting to get bought out by a massive company with deep pockets to corner the market on tabletop role playing, both in video games and in book creation. However, I do believe that roll20 could have a system that was free to use for everyone, where creators can retain control of their IP, but the core rules are free of any encumbrance or restriction of ownership.  That way, nobody can change their mind later.

Well, you can play anything on Roll20 if you just want bare-bones functionality - map pages, voice and/or video chat, dice rolling, using the Bio and Info tab of a character journal as your character sheet - that is what attracted me to Roll20. I got my Pro so I could indulge in all the icing on the cake.

Good news (sort of, depends on how patient you are)! Paizo is helping create a irrevocable open gaming license, with many of the people involved were part of the original OGL and it is to be managed by a nonprofit (like Linux). They won't own it, so even if they're bought out, it can't be bought. All of their content will be under this license, going forward (once it's done). But it isn't yet. It might be worth looking into Pathfinder (especially PF2e, if you like 5e), but I'm sure there's plenty obnoxious people on the internet shouting "try my game" and I can say PF definitely has some pretty... zealous fans, to say the least. And like any RPG, it's probably not for everyone. I like both PF1e and PF2e, but they're not my favorite games ever (that would probably be BitD, honestly). Still, that's what you've asked for - a truly open gaming license.

Yep, Paizo is doing exactly what I was hoping for. No other measure was going to be enough for me other than what they did, honestly.  It needed to be done and they are doing it.  I wanted under a non-revocable license, like the GPL.  I'm very comfortable with this license due to my history in software.  I'm so glad to see certain companies leaning into this and I know this list will just grow in time.  We're playing CoC now, and so glad to see that company support this move. So, thank you.  I have never felt so validated in asking this in a few places and seeing the reactions. This thread: This is good enough, available on r20.  Along with some positive notes. /r/dnd: this is being talked about everywhere, talk there, this is stupid, why do you need it, downvote. /r/rpg: Just play a non wotc product, why are you crying about people selling out. Downvote. Others: shut up, nobody is going to do that. I look forward to buying an ORC license set of books. :)

Take a look at EN Publishing's W.O.I.N. (What's Old Is New). It's a career-based d6 pool system that has character sheets here on Roll20. They have O.L.D., N.O.W., and N.E.W. source books for fantasy, modern/superhero, and sci-fi gaming. The license is very open from what I remember, and with the recent bruhaha, they are looking at investing further in it. In the past, they had the Judge Dread and associated worlds license and released several sourcebooks for that license using W.O.I.N. EDIT: I just found out that it is currently using OGL 1.0a., but EN Publishing is planning to use a different license (maybe Paizo's?).

Brian C. said: Take a look at EN Publishing's W.O.I.N. (What's Old Is New). It's a career-based d6 pool system that has character sheets here on Roll20. They have O.L.D., N.O.W., and N.E.W. source books for fantasy, modern/superhero, and sci-fi gaming. The license is very open from what I remember, and with the recent bruhaha, they are looking at investing further in it. In the past, they had the Judge Dread and associated worlds license and released several sourcebooks for that license using W.O.I.N. EDIT: I just found out that it is currently using OGL 1.0a., but EN Publishing is planning to use a different license (maybe Paizo's?). You'd be surprised by the number of publishers who use OGL 1.0a. This is why it's such a big deal. Also, technically ORC won't be owned by Paizo, although they're fronting a big part of the bill. It's a coalition of industry legal specialists, smaller publishers, and hobby enthusiasts (with Paizo leading the charge, obviously). Honestly, you can think every Paizo product is a dumpster fire and still see the need for a creative commons style gaming license run by a non-profit that can't be bought.