The Open Hue Controller works just like the online version, except that it is installed, on your computer. The benefits of this are that insecure content doesn't have to be allowed and that it can be used without a public internet connection.
You may be alerted that the developer is unknown when you download the Hue Controller. This is due to it being tough for a small developer like me to persuade a large corporation that my products are secure. It should simply be ignored.