Open Source Java System Software for BSD

ZK is an open-source Java framework for building modern web and mobile applications. It enables developers to create rich, interactive UIs using only Java — no JavaScript required. With 200+ Ajax-powered components, event-driven architecture, and support for popular technologies like Spring, Java EE, and JSP/JSF, ZK makes it simple to deliver powerful and user-friendly web applications.

PlayBilling is a webbased billing system for internet cafe and wireless hotspot provider mostly written in Java featured with: tariff management, prepaid, postpaid and discounts, user management and extensive reporting system

Freedomotic is an open source, flexible, secure Internet of Things (IoT) development framework, useful to build and manage modern smart spaces. It is targeted to private individuals (home automation) as well as business users (smart retail environments, ambient aware marketing, monitoring and analytics, etc). Freedomotic can interact with well known standard building automation protocols as well as with "do it yourself" solutions. It treats the web, social networks and branded frontends as first class components of the system. [GITHUB REPOSITORY] https://github.com/freedomotic/freedomotic [USERS' MANUAL] http://freedomotic-user-manual.readthedocs.io/ [DEVELOPERS' MANUAL] http://freedomotic-developer-manual.readthedocs.io/ [INTERNATIONAL COMMUNITY] https://groups.google.com/forum/#!forum/freedom-domotics [ITALIAN COMMUNITY] https://groups.google.com/forum/#!forum/freedomotic-it [REPORT AN ISSUE] https://github.com/freedomotic/freedomotic/issues