Open-source IT tools

AirbyteData Engineering

Airbyte configures connectors and connections to replicate data between systems.

AnsibleDeveloper Tools & DevOps

Ansible uses inventories and YAML playbooks to automate configuration and operational tasks.

AnythingLLMAI Platforms & Generative AI

AnythingLLM is a free, MIT-licensed desktop and self-hostable app (by Mintplex Labs) for chatting with your own documents locally, with a separate paid team/cloud option.

Apache SupersetAnalytics & BI

Apache Superset is a free, Apache 2.0-licensed BI tool with 40+ chart types, a SQL Lab editor, and connectors to 70+ databases, self-hosted or via managed providers like Preset.

AppFlowyKnowledge Management

AppFlowy is an open-source workspace app for docs and wikis, offered as a desktop app backed by hosted AppFlowy Cloud or a self-hosted AppFlowy Cloud deployment.

AppsmithDeveloper Tools

Appsmith helps developers assemble internal tools using data connections, UI widgets and JavaScript.

AppwriteDatabases

Appwrite is a self-hostable backend platform providing authentication, databases, storage, functions and messaging through a unified API and SDKs.

ArgoCI/CD

The Argo project includes Argo CD for GitOps delivery and related Kubernetes workflow tools.

AstroDeveloper Tools

Astro is an open-source, MIT-licensed framework for content-driven sites using islands architecture, shipping minimal JavaScript by default; its team joined Cloudflare in January 2026.

AtlantisInfrastructure as Code

Atlantis is an open-source (Apache-2.0) Go application you deploy yourself; it listens for GitHub, GitLab or Bitbucket pull request webhooks and runs terraform plan/apply from PR comments, with workspace locking.

BudibaseDeveloper Tools

Budibase is an open-source low-code platform for building internal applications, workflows and automations, free to self-host indefinitely or available as a hosted Pro/Premium/Business cloud service.

CapRoverCloud Providers & Hosting

CapRover is a free, Apache-2.0-licensed PaaS built on Docker, Nginx and Let's Encrypt for deploying apps on your own servers, with no paid tier or vendor lock-in.

CassandraDatabases

Apache Cassandra is an open-source, peer-to-peer NoSQL database that replicates data across nodes and datacenters with tunable consistency and no single point of failure.

CheckmateIT Operations & Sysadmin

Checkmate tracks service availability, response times and server health from a self-hosted installation.

ClickHouseDatabases

ClickHouse is an open-source (Apache 2.0) columnar OLAP database built for sub-second analytical queries at scale, self-hosted or via usage-based ClickHouse Cloud.

CoolifyCloud Providers & Hosting

Coolify is a free, open-source PaaS you install on your own server to deploy apps, databases and 280+ one-click services, with an optional $5/month Coolify Cloud convenience tier.

CrewAIAI Platforms & Generative AI

CrewAI is an MIT-licensed open-source Python framework for orchestrating multi-agent AI workflows; CrewAI Enterprise adds a hosted runtime with a free Basic tier and custom-priced governance features.

DagsterData Engineering

Dagster is an open-source Python orchestrator built around software-defined assets. Its creator, Dagster Labs (formerly Elementl), was acquired by Prefect in 2026; the open-source project keeps its license and Dagster+ continues unchanged for existing customers.

dbtData Warehousing & Lakehouse

dbt lets analytics engineers transform warehouse data using SQL with version control, testing and documentation; dbt Core is free and open source, dbt Cloud adds managed orchestration.

Dev.toTutorials & Learning

Dev.to, built on the open-source Forem platform, is a free community where developers publish articles, discuss technology and build public profiles.

DifyAI Platforms & Generative AI

Dify (by LangGenius) is an open-source platform for building LLM apps with a visual workflow builder, RAG pipeline and agent tools; self-host the Community Edition free or use Dify Cloud on a freemium plan.

DockerContainers & Kubernetes

Docker provides tools to build container images, run isolated containers, define multi-service applications with Compose, and distribute images through registries.

DokployContainers & Kubernetes

Dokploy manages application and Docker Compose deployments on servers through a web interface.

DooryBusiness Software

Browser-based Canva alternative for posters, social graphics, presentations and print designs, with guest editing, real-time collaboration, brand kits and self-hosted deployment.