LetterStack

What it does

Transactional email APIs are convenient until free tiers cap daily volume - or you pay for SMTP you already have. LetterStack is the developer layer on your own SMTP: Handlebars templates, one REST send endpoint, send logs. Connect Gmail, Amazon SES, Zoho, or self-hosted. Your SMTP, your reputation. No volume caps from us. From $1/mo. First month free through June 30, 2026.

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  Letterstack2020 · letterstack.co · ▲382

  Resources for building, growing and monetizing a newsletter

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  Maillayer2024 · maillayer.com · ▲462

  Send email campaigns via Amazon SES with NoCode

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  Greenmor Mail2025 · greenmormail.com · ▲212

  One inbox. Outreach, team chat, AI, and video — built in.

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  Mailtrack.io2014 · mailsuite.com · ▲282

  The best email tracking solution I've found. Free

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  1SecMail2025 · tmaily.com · ▲112

  Free disposable email that actually arrives in real time

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  Mailet2022 · getmailet.com · ▲132

  Mailet provides you with free temporary email addresses

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  Run full iOS 16.5 firmware on Android Devices▲515

  Contribute to oosexgang/hackios-xnu-kernel development by creating an account on GitHub.

  Dev tools · 1d ago · github.com

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  /dev/null▲492

  a social network for devs

  Dev tools · 5d 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 · 29d 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 · 27d ago · github.com

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  OpenBot▲362

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

  Dev tools · 25d 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 · 22d ago · talanoa.email

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  Brew ▲900

  Like Claude design for email marketing

  AI · May 2026 · brew.new

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  Kilo Code for VS Code▲896

  Parallel agents, diff reviewer, and multi-model comparisons

  Dev tools · May 2026 · kilo.ai

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  StoreClaw▲806

  Grow your store profits with agents that know how to sell

  AI · May 2026 · storeclaw.ai

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  PollyReach▲795

  Give your agent a real number and voice to make calls.

  AI · May 2026 · pollyreach.ai

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  Needle: We Distilled Gemini Tool Calling into a 26M Model▲776

  Hey HN, Henry here from Cactus. We open-sourced Needle, a 26M parameter function-calling (tool use) model. It runs at 6000 tok/s prefill and 1200 tok/s decode on consumer devices. We were always frustrated by the little effort made towards building agentic models that run on budget phones, so we conducted investigations that led to an observation: agentic experiences are built upon tool calling, and massive models are overkill for it. Tool calling is fundamentally retrieval-and-assembly (match query to tool name, extract argument values, emit JSON), not reasoning. Cross-attention…

  Life & fun · May 2026 · github.com

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  Files.md – Open-source alternative to Obsidian▲730

  🌱 Private, quiet space for thinking. Simple app for .md files. - zakirullin/files.md

  Dev tools · May 2026 · github.com