libbraille
Portable Library for Braille Displays

Features

supports over 40 Braille displays.: serial or USB terminals from most manufacturers are supported: Alva, Baum, Blazie Engineering, EuroBraille, HandyTech, Hermes, ONCE, Papenmeier, Pulse Data, TechniBraille, Tieman...
many programming languages: libbraille is usable from C, C++, Python, Java and JavaScript.
easy configuration: most displays are autodetected at initialisation. A Braille Pane for the Mac OS X System preferences is available.
open source and free software: this software is distributed under the LGPL Free Software Licence so that any developer who wants to write an accessible application could use it.
portable: it has currently been tested on linux, win32, MacOS X, FreeBSD and Solaris
international: it is easy to change the Braille table.
easy to distribute: an easy to use windows installer is provided. Some packages for Debian GNU/Linux systems or RPM systems or Mac OS X systems are also available
provides a virtual graphical Braille keyboard: this virtual Braille keyboard in Gtk+ helps developers to test their application without owning an expensive device.