JTicket Manager is a generic and simple open source issue tracking tool. It has plain and simple straightforward user interface and basic issue tracking functionality as seen like in professional issue tracking software (Redmine).
It's main advantage is small footprint and completely embedded functionality - no external database needed. Everything is wrapped inside servlet and can be easily deployed in any Servlet 3.0 compliant servlet container (tested on Tomcat7 and Tomcat8). For ticket database HSQLDB database is used.
Web service is built on Vaadin framework
JTicket Manager is open source software provided under under Apache License 2.0