Ribit is a Scripts software developed by Tero Vuorela. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Ribit:

EditByMarydown: Ribit is a Wiki-clone designed for desktop and mobile device browsers. The implementation uses XHTML Basic and stylesheets. Current features: Webrick based, flat file storage, Wikit style syntax, categories for pages.
* Development Status: 4 - Beta
* Environment: Web Environment
* Intended Audience: End Users/Desktop
* License: GNU General Public License (GPL) version 2
* Natural Language: English
* Operating System: Linux
* Programming Language: Ruby
* Topic: Dynamic Content