Package Jacobi https://github.com/pjabardo/Jacobi.jl
I have just written a package that implements Jacobi polynomials and related functions (derivatives of Jacobi polynomials and its zeros). This package also implements Gauss-Jacobi quadrature rules, computing nodes and weights for cases including both ends of the domain (Gauss-Lobatto-Jacobi) or either end of the domain (Gauss-Radau-Jacobi) The package also has functions that compute derivatives at the quadrature nodes and computes the Lagrangian interpolants so to interpolate smooth functions. While much of this functionality is somehow available in other packages, this package is being used to implement a spectral element solver for Navier-Stokes equations which I will be releasing in a few weeks. Paulo
