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A complete Golang third-party package is here: https://code.google.com/p/go-wiki/wiki/Projects
Among them, I am very interested in these few:
11 Verification Code Package: CAPTCHA, can generate a picture of the verification Code or audio verification code, from the example, the picture verification code is very good, the source code here:
Https://github.com/dchest/captcha
No copyright restrictions.
21 people write cms:toropress, this does not appear in this list, but the maturity is very high, based on the Beego framework, Beego Framework is also developed by the Chinese
Source code: Https://github.com/insionng/toropress
Online Demo: http://www.sudochina.com
This does not indicate the copyright, but to see the meaning, if it is a commercial application, it seems to be to give money.