Framework:

Advanced generic agent: Agent-zero (needs setting up local/external endpoints + invest time in optimizing)

Easy setup/integration with std linux: Newelle (flatpak, and downloads own dependencies/extensions. You choose)

Working advanced chat/agent abilities out of the box: cherry-studio (flatpak, default free glm4.5/qwen models can be changed)

Local endpoints: llamacpp, ollama, vllm, transformer (huggingface) or depending on your hardware. Another option is gpt4free that are a tool/library that collects free chat on the net and set them up as a local endpoint. Aihorde is also great.