I was just wondering the other day about the llm frameworks out there. Ones I've heard things about:

Griptape

Dspy

Autogen

Guidance

Semantic kernel

Marvin from prefect

Haystack

And of course langchain and Llamaindex.

Which ones am I missing? Are any of them particularly good? Things like a simple way to interact with it (Marvin stands out), clean and organized code base, good support... If I had to pick one today I'd probably pick semantic kernel but not because I have used it, just because the ones I've used have either fallen short or been too much unnecessary complexity.