OpenProject

Wekan is a web‑based, open‑source kanban board that lets you organize tasks, projects, and workflows in a visual, drag‑and‑drop interface. It can be self‑hosted on your own server, giving you full control over data and customization.

✦ Best for small teams or freelancers wanting a free, self‑hosted kanban board

Kanboard is an open‑source project management tool that visualizes work using simple Kanban boards. It runs on any web server and requires no subscription, making it ideal for budget‑conscious teams.

✦ Best for small teams or solo users needing a free, self‑hosted kanban board

Focalboard is a project management and organization tool that allows users to create boards, lists, and cards to track their work. It's designed to be flexible and customizable, with features like drag-and-drop card movement and customizable workflows.

✦ Best for large dev teams

Leantime is a lightweight, open-source project management platform designed to help small teams and freelancers plan, track, and deliver projects efficiently.

✦ Best for small teams or freelancers needing a free, self‑hosted pm tool

Anthias is an open source digital signage project that allows users to create and manage digital signage content. It provides a simple and intuitive interface for creating and scheduling content, and supports a wide range of media formats.

✦ Best for small businesses with basic signage needs

kaneo is an open source project management tool designed to be simple and efficient. It aims to provide all the necessary features for project management without unnecessary complexity.

✦ Best for small teams and solo freelancers

Plane is an open-source project management platform that lets product, engineering, and project teams track issues, run development cycles, and manage roadmaps with a rich text editor and built‑in analytics.

✦ Best for small teams seeking free project management

Mantis is an open‑source image cropping library for iOS and Mac Catalyst, written in Swift and usable from both UIKit and SwiftUI.

✦ Best for ios developers needing image cropping

Freedcamp is a project management and collaboration platform built around a strong free tier that includes tasks, discussions, a calendar, file storage, milestones, and time tracking with unlimited projects and storage.

✦ Best for budget-conscious teams that want a genuinely free tier plus optional crm and invoicing

Shortcut is a lightweight project management platform built for software development teams. It combines a clean interface with powerful workflow features like stories, epics, and iterations, letting teams plan, track, and ship code efficiently.

✦ Best for small to midsize software teams needing agile workflow simplicity

Basecamp is an opinionated project-management and team-communication tool that bundles to-dos, messages, schedules, and docs with a deliberately simple, calm approach. It favors flat pricing and reduced busywork.

✦ Best for small teams seeking simplicity

Ubuntu is a free and open-source operating system for desktop and server use. It is based on the Linux kernel and is widely used by developers, testers, and users around the world. Ubuntu is known for its ease of use, flexibility, and customizability.

✦ Best for developers and power users

Invoiceninja is a source-available app that helps businesses manage their invoicing, quoting, projects, and time-tracking in one place. It is built with Laravel and offers a range of features to streamline financial management and improve productivity.

✦ Best for freelancers and small tech teams

ClickUp is a highly configurable all-in-one productivity platform combining tasks, docs, whiteboards, goals, and dashboards, aiming to replace multiple tools. It offers many views and deep customization.

✦ Best for teams seeking ultimate flexibility and control

Asana is a work management platform that helps teams organize tasks, projects, and cross-functional workflows in list, board, timeline, and calendar views.

✦ Best for cross-functional teams and small marketing teams

Jira is a proprietary issue tracking product developed by Atlassian that allows bug tracking and agile project management.

✦ Best for large software teams and enterprises

Planka is an open‑source, Kanban‑style project management tool that lets teams create projects, boards, lists and cards. Its drag‑and‑drop interface updates instantly for all connected users, and card descriptions support full Markdown.

✦ Best for experienced writers needing productivity boosts

Twenty is an open-source CRM that provides building blocks for developers to create a tailored sales platform. It lets you define custom objects, fields, and views so the system evolves with your business.

✦ Best for technical teams needing customization

Worklenz is a free, open-source project management platform for teams and agencies, bringing projects, tasks, resource planning, and client collaboration into one workspace.

✦ Best for agencies and professional services teams wanting open-source project management with budgets and time in one place

Vikunja is an open-source task management application built around the idea that you should own your data.

✦ Best for users who want full data ownership over their task manager and don't mind self-hosting or paying for managed hosting.