Instaclustr, managed Cassandra hosting on AWS

What it does

Production-ready Apache Kafka, Cassandra, PostgreSQL, OpenSearch, ClickHouse, and Cadence — fully managed, on anyfrom instaclustr.com

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  SocketCluster.io – flexible open-source real-time server with pub/sub2016 · socketcluster.io · ▲217

  Scalable open source pub/sub SDK with support for RPC, JWT authentication and Kubernetes — optimized for async/await

• OS
  OpenWorkers – Self-hosted Cloudflare workers in RustJan 2026 · openworkers.com · ▲500

  I've been working on this for some time now, starting with vm2, then deno-core for 2 years, and recently rewrote it on rusty_v8 with Claude's help. OpenWorkers lets you run untrusted JS in V8 isolates on your own infrastructure. Same DX as Cloudflare Workers, no vendor lock-in. What works today: fetch, KV, Postgres bindings, S3/R2, cron scheduling, crypto.subtle. Self-hosting is a single docker-compose file + Postgres. Would love feedback on the architecture and what feature you'd want next.

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  PgCat, Postgres pooler with sharding, load balancing and failover2022 · github.com · ▲233

  PostgreSQL pooler with sharding, load balancing and failover support. - postgresml/pgcat

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  Artifact Keeper – Open-Source Artifactory/Nexus Alternative in RustFeb 2026 · github.com · ▲166

  I'm a software engineer who keeps getting pulled into DevOps no matter how hard I try to escape it. I recently moved into a Lead DevOps Engineer role writing tooling to automate a lot of the pain away. On my own time outside of work, I built Artifact Keeper — a self-hosted artifact registry that supports 45+ package formats. Security scanning, SSO, replication, WASM plugins — it's all in the MIT-licensed release. No enterprise tier. No feature gates. No surprise invoices. Your package managers — pip, npm, docker, cargo, helm, go, all of them — talk directly to it using their native…

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  Velvet – Store OpenAI requests in your own DB2024 · usevelvet.com · ▲109

  Hey HN! We’re Emma and Chris, founders of Velvet (https://www.usevelvet.com). Velvet proxies OpenAI calls and stores the requests and responses in your PostgreSQL database. That way, you can analyze logs with SQL (instead of a clunky UI). You can also set headers to add caching and metadata (for analysis). Backstory: We started by building some more general AI data tools (like a text-to-SQL editor). We were frustrated by the lack of basic LLM infrastructure, so ended up pivoting to focus on the tooling we wanted. So many existing apps, like Helicone, were hard to use as power…

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  UI for Apache Kafka2021 · github.com · ▲158

  Open-Source Web UI for Apache Kafka Management. Contribute to provectus/kafka-ui development by creating an account on GitHub.

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  /dev/null▲490

  a social network for devs

  Dev tools · 4d 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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  Run full iOS 16.5 firmware on Android Devices▲386

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

  Dev tools · 15h ago · github.com

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  OpenBot▲362

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

  Dev tools · 24d 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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  Analytics.js – The analytics API you've always wanted▲326

  Dev tools · 2012 · segmentio.github.com

• SI
  Scratchpad.io - a real-time HTML and CSS editor▲298

  Dash is a fun and free online course from General Assembly that teaches you how to program with the basics of web development through projects you can do right in your browser. Get started today!

  Life & fun · 2012 · scratchpad.io

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  Interactive SICP▲280

  Life & fun · 2012 · xuanji.appspot.com

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  CSS3 animation▲271

  An experiment with basic CSS3 animations.

  Life & fun · 2012 · thegoodman.cc

• CD
  Clojure DSL for pattern-matching, parsing and generic programming▲204

  Life & fun · 2012 · scattered-thoughts.net

• ET
  Ember Table by Addepar▲199

  Life & fun · 2012 · addepar.github.com