1. Show HN: Real-time n-body tree code in CUDA (github.com)
A real-time CUDA accelerated Barnes-Hut tree code for the n-body problem using C++ and OpenGL. - lechebs/nbody
2. Show HN: ChessFlex – iPhone chess with no server, no accounts (P2P via QR) (apps.apple.com)
Download ChessFlex by Labham LLC on the App Store. See screenshots, ratings and reviews, user tips, and more apps like ChessFlex.
4. Show HN: Selvedge – long-term memory for AI-coded codebases (selvedge.sh)
A local MCP server that AI coding agents (Claude Code, Cursor, Copilot) call as they work — logging the why behind every change into a SQLite file under .selvedge/ next to your code.
5. Let's Reinvent the Scroll Wheel (scrollpods.app)
Control scrolling with gentle AirPods tilts. Perfect for accessibility, productivity, and creative workflows.
6. Preempt_none Is Dead; Your Postgres Probably Doesn't Care (thebuild.com)
Linux 7.0 doesn't halve Postgres throughput—but a 96-vCPU benchmark without huge pages does.
7. Show HN: SpeechCompass – speaker direction for captioning group conversations (github.com)
"Making group conversations more accessible. Real-time speaker localization and directional guidance for mobile speech-to-text. ACM CHI 2025 Best Paper Award." - google-deepmind/speech-co...
8. Show HN: PastPage – Find archived versions of dead links (github.com)
PastPage source recovery browser extension. Contribute to nabertronic/pastpage development by creating an account on GitHub.
9. Show HN: Snitch – Deterministic prose claim verifier for coding agents. (OSS) (github.com)
Snitch is a deterministic prose claim verifier for AI coding agents for macOS. - fristovic/snitch
10. Show HN: Hacker News book recs as study guides (biteread.ai)
Great reads for those in engineering and tech
11. Show HN: Opula – portfolio and net-worth analysis as a hosted MCP connector (opula.io)
Opula turns Claude and ChatGPT into your personal wealth analyst. Track net worth, holdings, cash flow, dividends and risk; get market briefs and net-worth projections. Connect once, no app, no account linking.
12. Show HN: Mojave Paint for macOS, edit images like it's 1999 (mojavepaint.app)
13. Show HN: The Flint Programming Language (github.com)
The Flint Compiler. Contribute to flint-lang/flintc development by creating an account on GitHub.
14. Show HN: R3 – A Local Code Review Tool for You and Your AI Agent (github.com)
r3 - Review. Revise. Resolve. A code review tool that runs on your machine and sparks joy ✨ when reviewing AI-generated code and docs. - hyperlogue/r3
17. Show HN: UniFi OS Server in Docker (github.com)
Contribute to unihosted/unifi-os-server-docker development by creating an account on GitHub.
20. Show HN: Pay-per-call MCP server with 47 AI endpoints, micropayments via x402 (goldbean-api.xyz)
47 endpoints. Pay per call. x402 / PayPal / Alipay.
21. Show HN: LifetimeR–A memento mori wallpaper generator (life,year,goal calendars) (lifetimer.vercel.app)
Visualize your life in weeks. Minimalist wallpapers for mindful living.
24. Show HN: Debloat Slack – Get rid of Slackbot, AI upsells and other annoyances (github.com)
Remove Slackbot and other useless features and get actual work done! Currently macOS only. - benri-ai/slack-debloat