SPF

What it does

Have you ever presented work on a screen or projector that completely blows out highlights or nice details of what you're presenting? Spf is a tiny, open source, Mac app that enables you to display a dark overlay on your screen so highlights actually show up!

A simple, open source Mac OS app for presentations on low-contrast monitors. - tannerc/spf

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  ScreenVeilMay 2026 · apps.apple.com · ▲86

  Hide what shouldn’t be seen on your computer

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  Screen – screen sharing for remote work, by the cofounder of Screenhero2020 · screen.so · ▲406

  Work together like you’re in the same room. Supports Mac, Windows, Linux, iOS, Android, Safari, Firefox & Chrome.

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  Rain Screen2024 · rain-screen.netlify.app · ▲286

  Make your Mac rain

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  Black Out2017 · apps.apple.com · ▲312

  Hide sensitive parts of an image before you share it

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  Overframe2018 · overframe.xyz · ▲190

  Record your prototype & app with device frame overlay.

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  Asdf Overlay – High performance in-game overlay library for Windows2025 · github.com · ▲77

  I am making a open source overlay library. Game overlay is for rendering contents on top of game screen. Representative examples are Discord and Steam in-game overlay. They are complicated because it has to hook rendering part of a game. Asdf overlay provides easy to use interfaces for rendering on top of game screen. I recognize game performance degradation due to overlay rendering, so GPU shared texture was used to avoid CPU framebuffer copy. Asdf Overlay is capable of rendering full screen overlay without noticeable performance loss.

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  /dev/null▲489

  a social network for devs

  Dev tools · 3d ago · dev-null.sh

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  Whiteboard (YC W26) – an open-source IDE for thoughtful software design▲423

  open-source IDE for thoughtful software design. Contribute to devdotfast/whiteboard development by creating an account on GitHub.

  Dev tools · 28d ago · github.com

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  Reladraw – A diagram language where you decide where to place things▲411

  Contribute to reladraw/reladraw development by creating an account on GitHub.

  Dev tools · 26d ago · github.com

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  OpenBot▲362

  Grok Bot alternative: free, local, open-source, multiplayer

  Dev tools · 23d ago · openbot.run

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  Talanoa▲346

  Hi HN, I’m a fullstack developer, and honestly, I’ve lost count of how many side projects I’ve worked on over the years. But one idea kept coming back to me: a different kind of email client. It first came to me in 2014: “What if we could handle emails more like conversations?” Every year, I’d revisit this concept in my “Build Notes.” Ten years later, no one had built exactly what I had in mind — so I finally decided to do it myself. That’s how Talanoa was born. I wanted something focused on people, not timelines. I was tired of marking messages as unread just to remember to reply later, or…

  Dev tools · 21d ago · talanoa.email

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  CoreSpeed▲332

  One MCP for everything your agents need: apps, memory, tools

  Dev tools · 28d ago · corespeed.io

• AR
  A retro video game console I've been working on in my free time▲2,690

  Software and hardware projects for fun from a guy who loves retro computing

  Life & fun · 2019 · internalregister.github.io

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  Accessible Brand Colors▲1,163

  A tool to make sure your brand colors are ADA compliant.

  Dev tools · 2019 · abc.useallfive.com

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  Checklist Design▲1,158

  The best UI and UX practices for production ready design

  Work · 2019 · checklist.design

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  Product Hunt Tab▲647

  A virtual co-working space in your browser's new tab

  Work · 2019

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  Notion 2.3▲622

  Notions big update, now with Evernote import and web clipper

  Work · 2019 · notion.so

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  Voiceflow▲607

  Build voice apps in your browser without coding

  Dev tools · 2019 · voiceflow.com