Recommend Free or opensource dub echo plugins

Are there any? I'd prefer opensource ones, so i can figure out what they're doing under the hood. Is there one that does the reggae dub riddim/dancehall echoes?

The mda dub delay seems close but sort of missing it a little.

What about Saike Reflectosaurus, with a preset to taste. JSFX, so open source. Might be a little complex though.

DelayArchitect

Well none will sound anywhere close to a real BBD or tape delay. Valhalla Delay is only $50 and has really nice high feedback behavior with carefully modeled resonances, saturations and so on. I assume that you mean something more than "filtered delay" when you say dub delay. For Linux I guess you can try the TAL delay . Making a proper dub delay in software requires a serious time and money investment and I doubt you'll find an open source version. I'd just go for hardware if that sound is important to you (seems like a good overview of the options I might actually get the strymon one now lol)

Not open source, but a free one I'm having fun with lately:

I've tried all of them. Tal-dub II is pretty good, but it saturates really quickly on feedback and internally it starts fizzing out too soon. Dubstation is nice with the regen. But they're both not opensource. The Saike reflectosaurus is pretty deep but i haven't been able to get a dub filter out of it yet. Delay architect seems ok, though it's crashed reaper a few times. I've been trying reaper feedbacking into a track with an fx plugin too, but I've had to raise the buffers too high.

Tried Overdubber 2?

ReaDelay can do a lot for me. I try to solve problems with stock plugins first. If I can't, then I move on to 3rd party.