# Is there a good Fortran package for SDE, DDE and ODE?

**URL:** <https://fortran-lang.discourse.group/t/is-there-a-good-fortran-package-for-sde-dde-and-ode/1756>\
**Category:** Uncategorized\
**Created:** [August 27, 2021, 6:19pm UTC](https://fortran-lang.discourse.group/t/is-there-a-good-fortran-package-for-sde-dde-and-ode/1756 "2021-08-27T18:19:57Z")\
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**Author:** ![ivanpribec](https://yyz2.discourse-cdn.com/free1/user_avatar/fortran-lang.discourse.group/ivanpribec/32/3290_2.png) [@ivanpribec](https://fortran-lang.discourse.group/u/ivanpribec)\
**Post date:** [August 27, 2021, 7:42pm UTC](https://fortran-lang.discourse.group/t/is-there-a-good-fortran-package-for-sde-dde-and-ode/1756/11 "2021-08-27T19:42:44Z")

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Just to be on the clear side, I was only quoting part of their conclusion. They do also make some remarks in favor of Julia. But perhaps the rebuttal of that paper can go to a new thread or the [Julia Discourse](https://discourse.julialang.org/).

To return to the original question, I have personally used the following ODE solvers:

- [dop853](https://github.com/jacobwilliams/dop853) (thanks to @jacobwilliams)
- [ddeabm](https://github.com/jacobwilliams/ddeabm) (also thanks to @jacobwilliams)
- [RKC: An explicit solver for parabolic PDEs](https://www.sciencedirect.com/science/article/pii/S0377042797002197) (available from netlib)
- [stiff3](https://github.com/ivan-pi/stiff3)

In a distant past I also used LSODE from ODEPACK which gave good results, but the API is rather cumbersome. Another problem with many of the Fortran ODE solvers is they are not thread-safe.

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