Apache Shiro is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management.
Apache Turbine is a servlet based framework that allows experienced Java developers to quickly build web applications. Turbine allows you to use personalize the web sites and to use user logins to restrict access to parts of your application.
Photoswipe is an open-source gallery to support JavaScript-based image zooming. Even if a browsers native zooming has been disabled, image zooming will still work.
handlebars provide the power necessary to let you build semantic templates, compatible with Mustache templates.
Apache UIMA enables applications to be decomposed into components.UIMA additionally provides capabilities to wrap components as network services, and can scale to very large volumes by replicating processing pipelines over a cluster of networked nodes.
Flex is a powerful, open source application framework that allows you to easily build mobile applications for iOS, Android, and BlackBerry Tablet OS devices, as well as traditional applications for browser and desktop using the same programming model, tool, and codebase
VRaptor 4 delivers high productivity to your Java Web applications on top of CDI. VRaptor is an opensource MVC framework with a large developers and users community.
Pyramid is a very general open source Python web framework.
Apache CXF is an open source services framework. CXF helps you build and develop services using frontend programming APIs, like JAX-WS and JAX-RS.
From an idea of a web db application to a live website in no time, for free. Professionals can use Jam.py to create various tools, dashboards, as well as large-scale business applications with complex internal logic.