As such, there is an imperative that efficient, accurate and robust software is available for the evaluation of these functions. The software for these functions is nowadays extremely good. Most of this software is normally of a high quality. Uncommon special fucntions. These are used much less often and so have not appeared in any standard packages.
Any free software is also liable to be of variable quality.
Further details Development of test methodologies and procedures for assessing the performance of software for standard special functions.