The gltext package offers a set of text rendering utilities for OpenGL programs. It deals with TrueType and Bitmap (raster) fonts. Text can be rendered in predefined directions (Left-to-right, right-to-left and top-to-bottom). This allows for correct display of text for various languages. This package supports the full set of unicode characters, provided the loaded font does as well. This packages uses freetype-go (code.google.com/p/freetype-go) which is licensed under GPLv2 e FTL licenses. You can choose which one is a better fit for your use case but FTL requires you to give some form of credit to Freetype.org You can read the GPLv2 (https://code.google.com/p/freetype-go/source/browse/licenses/gpl.txt) and FTL (https://code.google.com/p/freetype-go/source/browse/licenses/ftl.txt) licenses for more information about the requirements.