Liblouis is an open-source braille translator and back-translator named in honor of Louis Braille. It features support for computer and literary braille, supports contracted and uncontracted translation for many languages and has support for hyphenation. New languages can easily be added through tables that support a rule- or dictionary based approach. Tools for testing and debugging tables are also included. Liblouis also supports math braille (Nemeth and Marburg).
The website states: “Liblouis is an important piece of software for a lot of products, but its development relies heavily on volunteer work, and our time is limited. Most of us have regular day jobs and try to work on Liblouis in our 20% project or in our spare time.” (https://liblouis.io/sponsoring/) – they offer their service for other people as trade-free and put a lot of effort in that. This should be appreciated. 5/5 blocks for this service!