For the past 3 years, the development of DD4T was put on hold while we worked with SDL to merge our framework with SDL's own Digital Experience Accelerator (DXA). This merger was not as successful as we had hoped. We have therefore resumed active development of DD4T. This has resulted in the release of DD4T 2.5 for Microsoft .NET, on Dec 30, 2019.
For the many organizations using DD4T, it will be comforting to know that DD4T will continue to be a solid foundation on which to build your web applications. The community will continue to support you. Bugs will be fixed, stability will be improved and performance will be enhanced. Compatibility with Tridion and .NET is guaranteed, and technical trends will be followed.
DD4T (Dynamic Delivery for Tridion) enables the use of MVC frameworks in Java and .NET with Tridion. At its core, DD4T publishes Pages and Components as data into your Content Data Store rather than as code to your filesystem. You can then leverage tools which you know; such as ASP.NET MVC, Spring - or anything that can use REST to deliver your content in any view you like.
DD4T is built by the community. So, we depend on people's own time to help develop new features and fix bugs. You can help too!