- Definite integral approximations.
I'm not sure yet if these will all come in one release or will be spread out of multiple releases. It will partly depend on how long it takes for me to implement them. I already have parts of them written, but nothing has been tested yet and there is still lots to do to finish them up.
Once these are added, things will probably change direction slightly in that many of the features that get added will be for the pro version only. That isn't to say that no new features will be added to the free version after this, just that not everything being added will be available in the free version.