CodeBehind is a modern back-end framework under ASP.NET Core.
An object relational-mapping (ORM) library for Java
Admin panel builder / CRUD generator for Laravel
Virtual actor framework for building distributed systems
The dotCODES Source Control Maintenance Mainframe (SCM2)
giServer the easy to use and extensible batch and integration server
Write-Once, Deploy-Everywhere software framework
Apache Cayenne, Wicket, CXF, GWT, EJB examples as a framework
Mono open source ECMA CLI, C# and .NET implementation