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A reactive Python notebook editor that saves notebooks as ordinary Python files.

Build interactive terminal applications in Go with an event-driven model, update, and view loop.

A self-hosted browser notebook that keeps Markdown notes, links, comments, and history together.

Run analytical SQL in an embedded database from a local process or Python program.

Free, self-hosted group chat with rooms, direct messages, and no recurring subscription.

Define pull-request, build, and deployment jobs in screwdriver.yaml with pluggable execution engines.

Run a self-managed time-series database for recent metrics and event data.

A Java testing library that starts disposable Dockerized dependencies for integration tests.

A free self-hosted PaaS for deploying apps onto a Docker server you control.

A proxy-based API simulator that records traffic for repeatable tests without calling the real service each time.

Build event-driven applications with a cross-platform asynchronous I/O library.

Export NVIDIA GPU telemetry as Prometheus metrics for hardware and workload monitoring.

Deploy supported application code to managed dynos without administering the host servers.

Build reproducible software environments and run packages temporarily with a functional package manager.

Make Git diffs and related terminal output easier to scan with syntax and word-level highlighting.

Track configurable project issues and work in a self-hostable web application.

A self-hosted team timesheet for customer and project work with Jira integration and enterprise authentication.

An open-source in-memory data-structure server for caching, queues, and key-value workloads.

Use mutation testing to see whether a JVM test suite catches deliberately changed code.

Build equity-research reports with computed models and AI explanations

Add event calendars, sharing, and availability checks to a Nextcloud workspace.

Self-host an appointment booking page and team calendar, or use the project’s managed hosting.

Deploy applications, databases, and services to servers you control.

A Python load-testing framework that models user behavior in code and scales traffic across workers.