
Physica
Interactive solver and visual guide for projectile motion problems.
@Quaxguy · X
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Interactive solver and visual guide for projectile motion problems.
@Quaxguy · X

Protect your email and calendar by requiring unknown senders to solve a CAPTCHA or pay a fee.
felixdoerp · HN
Hi HN, The one thing AI reliably does is generate noise. Half the tools I see launch are just machines for producing more noise across more channels. And people are starting to see this in the form of emails in their inboxes as spam filters are struggling. There used to be a useful signal in email: the effort a sender put into customizing a message was a rough proxy for how relevant it actually was. AI killed that. Now it's customized slop with the appearance of effort with none of the cost. It is painful that the open internet / open channels have been abused like this. Captchainbox applies the idea of proof-of-work to email. If a sender is willing to do a bit of work to reach you, the message is more likely to be worth your time and the sender more likely to be real. The work is a traditional captcha. You can also set a pay-to-deliver amount if you want more friction. The proceeds of the delivery payment after transaction costs go to the Internet Archive and the EFF. The tool curr

Copy-paste React and Tailwind components with no dependencies.
@Brexcodex · X

Detects AI agent runaway loops and generates verified fix PRs for GitHub or local apply.
@void_rags · X
Introducing Orqis AI, an AI Watchdog that also fixes Agents. Have a look:

Audit your content's performance for AI-powered search engines.
@BayofDomain · X

View product work, engineering changes, and deployment status in one place to confirm shipping readiness.
@Abubakar_2005 · X
Working on two projects right now: -Hooklens – making webhooks easier to build and manage. -Conductor Labs – helping teams ship web apps with more confidence. Would love your thoughts! Hooklens: Conductor Labs:

Quality management system helping AI medical device startups achieve regulatory clearances.
@ZachInSpace · X
Launched a month ago

Daily coding challenges to keep developer skills sharp with AI assistance and streak tracking.
u/Administrative_Egg78 · Reddit
I built this because AI was making me a dumb&lazy engineer I noticed something sad about how I use AI. I was shipping faster, but practicing less. I could get answers quickly, but I was losing the habit of working through the fundamentals myself. So I built Unrot: short daily challenges for developers across languages, system design, architecture, data engineering, and other tracks. Game/xp and rewards system, a tiny bit competitive. No signup required to try it: https://unrot.dev

AI fact-checking platform that verifies news, videos, images, and claims with instant truth scores.
@Banshee_1212 · X
building a deepfake detection platform,

Get a quality score for your AI prompt and an optimized rewrite for ChatGPT, Claude, or Gemini.
@bestaipacks · X
Qa prompt tool Let's you fix bad ai prompts for free, gives you a score and saves your improved versions. Paid account gets more qa reports, access to better models and ability to re run improved prompts on just about any model

Analyze landing pages for conversion issues and get ranked fixes with estimated lift.
@JonBuildsHQ · X
My project is A tool for SaaS founders to spot landing page leaks. What are you working on?

Scan Yelp reviews for policy violations and generate ready-to-send disputes automatically.
@Belcherapp · X