Today, I released Ahven 2.4. It is mostly a maintenance release, since despite my plans, I didn't get much done last year. The biggest changes are a compile fix for Apex Ada, documentation improvements, and a comfignat-based build system in contrib/comfignat directory.
I will be making this comfignat-based build system to be default build system for GNAT in Ahven 2.5, but I am already including it to Ahven, so people can get used to it and possibly report bugs.
As usual, you can get the source code from SourceForge.