I just released my first open-source project called Prompt Builder — it lets you add local files, fetch YouTube transcripts, fetch content from URLs, etc. to your LLM prompts.
I've found it super useful for long-context tasks like writing, coding, and casual research. Essentially any case where you have a bunch of material that you would like to inject into a prompt's context quickly.
There's also a lot of neat power-user features like web search, summarize a text before injecting (useful for condensing contexts that might be too long and/or distracting), transcribe local audio/video files, see exact token counts, reusable snippets with variables, etc.
Bring your own keys, local-first, and 100% open-source.
Just starting out so I would appreciate any feedback!