Product Radar

Hacker News • Apr 30, 2026

A multi-user, multi-board Task/Kanban MCP server.

An alternative for managing development agents, emphasizing multi-user, multi-board capabilities and ease of deployment via Docker.

multi user multi board Task/Kanban MCP server development agents

Hacker News • Apr 29, 2026

A daily, hand-made quiz website.

A human-curated, somewhat difficult daily quiz, explicitly stating 'no AI-generated questions.'

AI-generated questions

Hacker News • Apr 29, 2026

A map displaying aggregated UK fuel prices by county.

A tool providing up-to-date, county-level aggregation of UK petrol and diesel prices, sourced from the official government feed, with details on cheapest forecourts, averages, and price spreads.

UK government forecourt fuel price feed map aggregation petrol and diesel prices county-level

Hacker News • Apr 28, 2026

Tredict endurance sports training platform integrated as a ChatGPT App and Claude.ai widget.

An interactive ChatGPT app using MCP UI Apps for authenticated content, offering activity analysis and workout creation, with superior performance on Claude.ai for complex plan generation.

ChatGPT App Directory user-authenticated content iframe widgets sandboxed iframe

Hacker News • Apr 28, 2026

Give users a game while they wait for LLM results.

A solution to mitigate user frustration and improve perceived latency during LLM response times.

LLM user experience

ScrollLaunch: Product launch platform.

A platform to 'Launch Your Product. Get Seen Weekly.'

product launch

YubiKey physical security key clicker game proof of concept

YubiClicker: A clicker game requiring a physical security key (YubiKey).

A silly proof-of-concept game demonstrating YubiKey taps for proving personhood, inspired by Cloudflare's earlier idea.

Postgres workspaces for AI real-time data data warehouse

Polynya: Data platform to turn Postgres into workspaces for AI, streaming real-time data to Iceberg and providing ephemeral ClickHouse instances.

Solves the problem of expensive 24/7 data warehouses for AI agents by providing ephemeral, real-time data workspaces from Postgres to Iceberg, with ClickHouse instances on demand, simplifying complex data pipelines (Kafka, Debezium, Flink) into one command. Built on pg2iceberg.

prediction markets running tournament fake money group outings

App for friendly prediction markets to turn trips into a running tournament.

A low-stakes, fake-money prediction market app for social groups, inspired by degenerate platforms like Kalshi and Polymarket, available on Android and iOS.

AI-assisted workflow prediction market strategies backtesting engine custom DSL

TurbineFi, an AI-assisted workflow for building, backtesting, and deploying prediction market strategies.

An AI-assisted, non-custodial platform for deterministic prediction market strategy development and deployment, abstracting crypto rails.

Markdown reader LLMs code editors print

Markant, a dedicated Markdown reader, and Markbook, a new format for bundling Markdown files and images.

A fast, dedicated Markdown viewer optimized for large documents and LLM outputs, introducing Markbook as a Markdown-based ePub alternative.

cryptographic accountability layer AI agents protocol signed receipts

A cryptographic accountability layer/protocol for AI agents.

A protocol providing verifiable proof of AI agent actions through signed, hash-chained receipts, enhancing agent governance beyond mere logging.

AI social engineering influence/manipulation patterns antivirus

FalsoAI, a tool to detect influence and manipulation patterns in content.

An AI-powered "antivirus for human cognition" designed to detect social engineering, PSYOPS, and election manipulation, empowering users with greater control and awareness against persuasive content.

Hacker News • Apr 24, 2026

Storyfriend, a soft toy with an embedded speaker module that plays stories recorded by family members.

A screen-free, offline-capable, personalized storytelling device for children, enabling remote family members (even non-tech-savvy ones) to record and share stories via a simple phone call.

speaker-module 3D printing CAD electronics design

Hacker News • Apr 21, 2026

fmsg, an open distributed messaging protocol and its Go implementation (fmsgd).

An alternative to email and IM apps, offering built-in sender verification and message integrity, unlike email which requires SPF/DKIM/DMARC.

distributed messaging protocol binary messages verifiable by all peers DAG

Hacker News • Apr 21, 2026

A devtool for centrally managing AI Coding Agent tools and enforcing guardrails at runtime.

A devtool for developers to centrally manage and enforce guardrails for various AI Coding Agent tools.

AI Coding Agent tools centrally manage guardrails enforced at runtime Claude Code

Hacker News • Apr 20, 2026

CyberWriter, a Markdown editor leveraging Apple's on-device AI stack (Foundation Models, NLContextualEmbedding, SFSpeechRecognizer/SpeechAnalyzer) for features like semantic search, AI-powered writing assistance, and voice notes.

A privacy-focused Markdown editor that integrates Apple's on-device AI for advanced features, offering an alternative to cloud-based AI solutions, especially for sensitive data like health information.

Markdown editor Apple's on-device AI stack Foundation Models (macOS 26) ~3B-parameter LLM

Hacker News • Apr 20, 2026

Brygga, a modern, fast, and feature-rich IRC client for macOS.

A new, end-to-end functional IRC client for macOS, aiming to be modern, fast, and feature-rich.

IRC client macOS early development connect, join, send, receive, persist

Hacker News • Apr 19, 2026

DOMPrompter, a macOS tool that generates structured AI coding prompts by allowing users to click specific DOM elements.

A solution to the 'last-mile micro-tuning' problem in AI UI coding, making it easier to specify exact element changes to AI models.

DOMPrompter AI UI coding DOM-based UIs structured AI coding prompt