Sijio- Community Software - Version 1 Sijio is a fast, high performance, easy to use and fully customizable PHP online community software with open source code. It is equipped with all necessary professional tools and features to run a full fledged community site.We are always glad to assist you with any help and exhaustive information you need. Thus we provide our customers with professional support. Do you want to have a unique design or custom functionality for your site or you need additional support? Look no further. Take an advantage of our services.