Casebox is an open source File, Record and Task management system. You can define data models of different complexity and implement your own workflows (see Developer Docs). Casebox provides a safe and secure solution for all your data on a server that you control (hosted in your own office, a VPS, or even your personal computer).
Casebox is accessed from a web browser like Firefox, Chrome, or Internet Explorer. The web interface is similar to a desktop application and works without full page reload (similar to GMail).