Open Source Infrastructure

Voxel

An open-source desktop voice changer that feeds any app through a virtual mic

Streamers and players get a free, account-free alternative to paid voice changers, with AI voices that run on the CPU rather than a cloud service.

OpenSwells

Surf ratings and 16-day swell outlooks built on public NOAA data

It shows a real forecasting product can be built on public NOAA models and given away, a credible no-cost rival to Surfline's paid tier.

litek8s

Real Kubernetes for laptops, home labs and edge boxes, without etcd

For local dev and small edge boxes, it gives you the API that kubectl, Helm and Argo CD expect, without etcd or a heavy VM.

Hubzoid

Self-hosted team agents whose knowledge and rules live in plain files

It lets a small team share one governed agent brain with sign-in and approvals, using Claude or Codex subscriptions they already pay for.

Eglantine

Open-source Switch 2 emulation for Windows, Linux and macOS

It is the most active open Switch 2 emulation effort, already running Mario Kart World, and built in public under GPL-3.0.

TrueDate & Pre-AI Search

A browser extension that checks when an article was really published

For anyone researching online, it exposes old SEO posts dressed up as fresh and lets search skip the post-2023 content flood.

ThingStudio

Wire up an ESP32 or Pico by drawing a flow, then unplug the editor

It gives makers who know Node-RED a way to program cheap boards visually, and the result is plain MicroPython that runs on the chip with no cloud behind it.

litesql

A Go wrapper that keeps SQLite fast and free of busy errors under load

Go services that outgrow a naive SQLite setup avoid SQLITE_BUSY failures by default, without moving to a separate database server.

AssemblyForNeovim

See the compiled output of the function under your cursor without leaving Neovim

Performance-minded C, C++ and Rust programmers get Compiler Explorer's quick feedback offline, inside the editor they already use.

Vairë

PostgreSQL 18 on a VPS you rent, with backups, forks and access over WireGuard

For teams paying managed-Postgres prices for a few small databases, this offers backups, forks and guarded writes on a cheap VPS without a control plane to babysit.

OpenIDEA

An open-source native IDE for people whose hands already know JetBrains

Teams that live in IntelliJ's shortcuts get a free, Apache-licensed alternative that starts faster and uses less memory, without retraining anyone's muscle memory.

WolveKafka

Kafka consumption as a webhook: you answer each batch, it handles the rest

Application teams can process Kafka topics in whatever language they already use, without each service owning consumer groups, offsets, retries and dead-letter logic.

HolyArrs

A streaming-style front end for requesting and filing your home media library

For a home server running the whole *arr stack, it folds the request, search, download hand-off and subtitles into a single Go binary and one Docker container.

When a flag behaves differently on macOS, Alpine and Debian, this shows you before the script breaks in CI.

Willder

Shared, permissioned memory for coding agents, with an audit row per read

When several agents and people work from the same knowledge, Willder gives each one a scoped, revocable token so you can see and cut off exactly what any agent touches.

pgxio

Expose Postgres functions as REST and WebSocket routes straight from Nginx

For small teams whose API is mostly a thin wrapper over SQL, it removes the application server and leaves just Nginx and Postgres.

MeowDisplay

Use an iPhone, iPad or spare Mac as a touch screen for your Mac, free

A free, GPL-licensed alternative to paid second-screen apps like Duet and Luna, with real touch control of macOS from the device already in your pocket.

Flide

Exact, shared-context inference server for small Jev-style decision models

If you classify thousands of documents by asking a small model several questions about each one, Flide reads each document once and answers all the questions in one pass.

Eglantine

An open-source Switch 2 emulator for Windows, Linux and macOS

It is the most active public effort to run Switch 2 games on a PC, and the GPL-3.0 code continues the yuzu and Sudachi lineage in the open.

Laplace's Scissors

Edits an open model's readout layer to fix wrong answers, keeping right ones

For teams running open-weight models, it offers a surgical alternative to fine-tuning: repair specific failures in the readout layer and export a normal checkpoint.

SafeScript

A locked-down JavaScript subset that compiles to plain JS and PHP

If you want users to write plugins, formulas or agent tools for your app, this gives them a JavaScript they already know without handing them eval, globals or prototypes.

coldframe

A decoy refrigeration controller that records who comes knocking and why

Retail refrigeration controllers carry public CVEs and sit on the open internet, and this shows you who is probing for them without exposing a real one.

MAPLE

Gemma 4 26B cut to 48 experts per layer so it fits a 6 GB laptop GPU

If you only need a local model for Python and STEM work, cutting the experts you never use can buy a sixfold speed-up on hardware you already own.

xarray-sql

Run SQL over Xarray datasets with DuckDB, DataFusion or Polars

Teams sitting on climate or scientific arrays can query them with the SQL engines they already know, and the attention demo shows how far that idea stretches.