GVSDK4 coming soon. Lots of new features, which will include:

* Actor system (Actor, ActorList, ActorScene, Entity & AI)
* Object persistence (classes derived from TGVFPersistent are streamable)
* PolyPoint collision system (fast and accurate collision of irregular shaped sprites)
* Basic Physics (world, sphere, box, collision)
* Basic networking (reliable UDP, mail, http)
* Streaming system (memory, file, resource, zip)
* Audio (wav|mod|xm|it|s3m|ogg|mp3, streaming,multichannel)
* Much more
* Made in Delphi, for Delphi

A pre-alpha can be downloaded here.