I will show you the usage of Yan captcha service. In this tutorial, it's based on a simple ruby web application of the Sinatra web framework.
Before we start to use the service, it is necesary to get Yan …
经过一周的重构和开发，我的开源项目，验证码服务，打上了0.3的tag，算是一个release吧。
This release has been focusing on support for different types …
Inspired by a "Call to action" tutorial of Photoshop, I'd like to do the same thing with free and open source software, GIMP.
Before we start the journey, it's better to get well prepared. Take a look at the powerful plugin …