A Wolfram Alpha Perl Library by Gabriel Weinberg is available to access the API for reference, search, and semantic purposes. An API explorer allows to enter queries and display responses linked to a wide variety of topics useful for developers. With this tool that aims to get more familiar with the Wolfram Alpha API, users could increase efficiency when they decide to work specifically with Perl language. Download can be accessed on the libraries' site.
RhymeBrain is a service made to help writers, or anyone else for that matter, find rhymes for words, make new portmanteaus, and alliterate well. When writing with figurative language, or writing poems, such a tool can be very helpful for a writer who's currently stuck. It might also be helpful for such things as computer generated literature, but for that, you'd want a robust API with full access to the database. Well, you're in luck, because it does indeed exist.
Less than two months ago, Merriam-Webster announced that some of its references would be available via an API. Now, competitor Cambridge University Press has followed suit with the Cambridge Dictionaries Online API. Currently, Cambridge offers five dictionaries through an API (i.e. Cambridge Advanced Learner's Dictionary, Cambridge Dictionary of American English, Cambridge Business English Dictionary, Cambridge Learner's English-Turkish Dictionary, and Cambridge Leaner's Dictionary).