Heart of Gold - License
The Heart of Gold Middleware (Java) source code is licensed under LGPL.
'Components' below are not part of the Middleware, but independent, individual natural language processing software.
Most components of the Heart of Gold available for download from this web site can be obtained free-of-charge for non-commercial research and instruction (e.g., Sprout, TnT, Chunkie).
NLP components developed by external authors, institutions or companies are published under different licenses, e.g., RASP, LingPipe, ChaSen. Please check their web sites mentioned under Download.