Best LLM Related Open Source Tools - 2025?

I think 2025 is good year LLM wise.

Now please share the tools you're using with LLMs. I know that half of us here involves with coding by using tools such as Cline, RooCode, KiloCode, QwenCode, MistralVibe, etc.,

Similarly some of us here involves with writing by using Finetuned Writing models. Of course we need tools for writing too. I came across Mikupad, Writingway2, Arrows(p-e-w), WritingTools(theJayTea)

Coding & Writing are just 2 categories I mentioned. Also I mentioned only few tools here(from my bookmarks) & Of course there are so many more other tools exist online which everyone yet to catch. I'm sure around 50 tools available for each category, lets bring those here.

So what other tools are you using? (Please mention category or concise use case)

Just mentioning some categories to get quick replies:

Prompt, RAG, Brainstorm, AudioBook Maker, Ebook Maker, Second brain, Benchmarks, AI Assistant, Agents, Notebook, NoCode, Wiki, Storytelling/Worldbuilding, Image processing, Game creation,