Those are pretty niche stuff for mathematicians , engineers and 3d artists.
In terms of mainstream apps pretty much everything on Linux is open source I'd imagine because there is an itch there to scratch.
Games are an exception to this (I think) because although lots of developers love games the amount of entertainment value derided from playing a game is unlikely to be worth the time investment to build it.
In terms of mainstream apps pretty much everything on Linux is open source I'd imagine because there is an itch there to scratch.
Games are an exception to this (I think) because although lots of developers love games the amount of entertainment value derided from playing a game is unlikely to be worth the time investment to build it.