Kontext project is now open source as Docu project hosted in GitHub. At the moment, only SQLite is supported and other databases will be added once version 1.0.0 is ready. SQLite is used for easy setup and testing.
.NET Core SDK 2.1.3
.NET Core Runtime 2.1
If you are interested in developing cross-platform .NET Core web applications, please let me know.
The source code includes a default kontext.db database which has been seeded with sample sites and posts.