PromptyBox
Free AI prompts for ChatGPT, Gemini, Midjourney & DALL-E
What it does
Browse thousands of free AI prompts — ChatGPT prompts, image prompts for Midjourney & DALL·E 3, plus coding, logo, video and marketing prompts. Copy any prompt in one click.
Browse free AI prompts for ChatGPT, Midjourney & DALL-E 3 — image, logo, coding, video and marketing prompts. Copy in one click.
Discover, copy, and use the best free AI prompts for ChatGPT, image generation (Midjourney & DALL·E), coding, logos, video & marketing. The AI prompt library you'll actually use. Use the uploaded [reference image] as the subject's exact face, likeness and skin tone. Create a hyper-realistic, photorealistic image in full colour. Subject: a woman lying on her back on a floor covered in open newspaper pages, laughing with her head tilted and her eyes crinkled shut. Both hands are raised to her face, fingertips lightly touching the frames of her sunglasses. Wardrobe: a bright red ribbed turtleneck sweater with long sleeves pushed toward the wrists, and oversized heart-shaped sunglasses with…from promptybox.com
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Life & fun · 26d ago · everycube.alen.is
Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 26d ago · baselashraf81.github.io
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Life & fun · 10d ago · louisabraham.github.io
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Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io
I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 16d ago · simedw.com